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(Change Layout)Stargate Atlantis  
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Season 1
1 :01x01 - Rising, Part 1 (Jul/16/2004)
After the gate address to the lost city of Atlantis is found, an expedition departs to the Pegasus Galaxy to check it out. Unfortunately, the city is found on the bottom of the ocean floor, and its shields are quickly losing power. In search of a ZPM or a safe place to stay, a team is sent to the planet Athos. They befriend the planet's inhabitants, but evil beings known as the Wraith then arrive.
Guest Stars: Michael Shanks as Dr. Daniel Jackson, Paul McGillion as Dr. Carson Beckett, David Milchard as SGC Technician, Robert Patrick as Colonel Marshall Sumner USMC, Garwin Sanford as Simon Wallis, Dan Shea as Sgt. Siler, Reece Thompson as Jinto, Craig Veroni as Dr. Peter Grodin, Boyan Vukelic as Sgt. Stackhouse, Edmond Wong as Atlantis Technician, Melia McClure as Female Ancient, Dean Marshall as Sgt. Bates, Richard Dean Anderson as Brigadier General Jack O'Neill, Mary Joan Buchanan as Beckett's Mom, Stefano Colacitti as Toran, Casey Dubois as Wex, Aaron Dudley as Male Ancient, Bro Gilbert as Scientist, Peter Grasso as Scientist, Ona Grauer as Ayiana, Christopher Heyerdahl as Halling
Director: Martin Wood
Writer: Brad Wright (1), Robert C. Cooper (3)
 
2 :01x02 - Rising, Part 2 (Jul/16/2004)
The Wraith have captured many of the Athosians and SGA expedition members, before leaving through the Stargate. Back at Atlantis the shields continue to lose power, due to the limited energy left in the last remaining ZPM. Major Sheppard eventually gets approval to lead a rescue mission to the Wraith’s ship’s location. The rescue team finds almost all the Wraith are in hibernation in the ship and the captured people stored in cocoons or holding cells.

Sheppard must find away to rescue the people, before more Wraith awaken, but he also is faced with making a terrible sacrifice along the way.
Guest Stars: Paul McGillion as Dr. Carson Beckett, Craig Veroni as Dr. Peter Grodin, Christopher Heyerdahl as Halling, Andee Frizzell as The Keeper, | Co-Guest Stars: Boyan Vukelic as Sgt. Stackhouse, James Lafazanos as Male Wraith, Reece Thompson as Jinto, Geoff Redknap as Old Colonel Sumner, Dan Payne as Wraith Warrior, Stefano Colacitti as Toran, Dean Marshall as Sgt. Bates, Casey Dubois as Wex
Director: Martin Wood
Writer: Brad Wright (1), Robert C. Cooper (3)
 
3 :01x03 - Hide and Seek (Jul/23/2004)
Kids playing a game of hide and seek in the city, accidentally release a strange and apparently malevolent energy force, which threatens all of Atlantis. Meanwhile, Dr. McKay’s experiment with an Ancient personal protection device leads to a threat to his life.

Can the Atlantis team defeat a formless energy alien while trying to also save Dr. McKay from a slow death?
Guest Stars: Craig Veroni as Dr. Peter Grodin, Christopher Heyerdahl as Halling, Paul McGillion as Dr. Carson Beckett, | Co-Guest Stars: Boyan Vukelic as Sgt. Stackhouse, Reece Thompson as Jinto, Casey Dubois as Wex, Meghan Black as Marta
Director: David Warry-Smith (3)
Writer: Robert C. Cooper (3)
Story: Brad Wright (1)
 
4 :01x04 - Thirty-Eight Minutes (Jul/30/2004)
After Sheppard is attacked by a strange, Wraith-like bug, the team heads back to Atlantis through the planet's orbital stargate. However, their Puddle Jumper gets stuck in the gate when the engine nacelles fail to fully retract into the Jumper, leaving them only thirty-eight minutes to get through the Stargate before the wormhole's event horizon closes.
Guest Stars: Craig Veroni as Dr. Peter Grodin, Paul McGillion as Dr. Carson Beckett, Fiona Hogan as Simpson, Christopher Heyerdahl as Halling, Ben Cotton as Dr. Kavanagh, | Co-Guest Stars: Joseph May (1) as Sgt. Markham, David Nykl as Dr. Radek Zelenka, Boyan Vukelic as Sgt. Stackhouse, Edmond Wong as Atlantis Technician
Director: Mario Azzopardi
Writer: Brad Wright (1)
 
5 :01x05 - Suspicion (Aug/06/2004)
The team comes in hot, having encountered the Wraith for the fifth time in nine missions. There’s no longer any doubt: someone in Atlantis spies for the Wraith. Weir convenes a planning meeting that excludes Teyla. She and Lieutenant Ford establish protective zones against sabotage that exclude the Athosians and interview the Athosians one by one. The Athosians become angry at this suggestion that they’re not trusted. Weir and Sheppard must uncover the spy without alienating the allies who know the Pegasus galaxy.
Guest Stars: Paul McGillion as Dr. Carson Beckett, Christopher Heyerdahl as Halling, Ross Hull as Dr. Corrigan, | Co-Guest Stars: Agam Darshi as Athosian, Andre Benjamin as Guard, Edmond Wong as Atlantis Technician, Boyan Vukelic as Sgt. Stackhouse, David Nykl as Dr. Radek Zelenka, Dean Marshall as Sgt. Bates, Phoenix Ly as Yamato, Santo Lombardo as Athosian, James Lafazanos as Male Wraith
Director: Mario Azzopardi
Story: Kerry Glover | Teleplay: Joseph Mallozzi, Paul Mullie
 
6 :01x06 - Childhood's End (Aug/13/2004)
Shortly after detecting an energy field, the team's Puddle Jumper unexpectedly crashes. As they begin searching for the field's source to shut it down in order to get their Puddle Jumper working again, they run into a village of children that believe that killing themselves when they reach the age of 24 keeps the Wraith away.
Guest Stars: Dominic Zamprogna as Aries, Courtenay J. Stevens (1) as Keras, Shane Meier as Neleus, | Co-Guest Stars: Calum Worthy as Hunter Kid, Julie Patzwald as Pelias, Alana Husband as Ennea, Sam Charles as Casta, Jessica Amlee as Cleo
Director: David Winning
Writer: Martin Gero
 
7 :01x07 - Poisoning the Well (Aug/20/2004)
With Beckett's help, a planet's inhabitants create a drug capable of preventing the Wraith from feeding on them. However, they soon discover the devastating side effects it has on both the Wraith and the user.
Guest Stars: Alan Scarfe as Chancellor Druhin, Paul McGillion as Dr. Carson Beckett, Allison Hossack as Perna, | Co-Guest Stars: James Lafazanos as Male Wraith, Edmond Wong as Atlantis Technician, Darren Hird as Dying Patient, Dean Marshall as Sgt. Bates, Neil Maffin as Merell
Director: Brad Turner (1)
Writer: Damian Kindler
Story: Mary Kaiser
 
8 :01x08 - Underground (Aug/27/2004)
The Atlantis team travel to the planet of the Genii, known by the Athosians to be good traders of food and crops. As Tayla and Ford barter for food with the farmers, Sheppard and McKay stumble on a secret underground research facility, which belies the society’s technological backwardness. The Genii are close to developing atomic bombs to use against the Wraith. After being captured in the secret site, McKay is intrigued, while Sheppard remains skeptical.

Now the team must either forge an alliance with these unlikely allies, or find a way to extricate them selves from being killed by the Genii, now that they know the team knows their secret.
Guest Stars: Erin Chambers as Sora, Ari Cohen as Tyrus, Craig Veroni as Dr. Peter Grodin, Colm Meaney as Cowen, | Co-Guest Stars: Darren Hird as Cocooned Victim
Director: Brad Turner (1)
Writer: Peter DeLuise
 
9 :01x09 - Home (Sep/10/2004)
After McKay discovers that a mist covering an alien planet can be used as a powerful energy source for the Stargate, the expedition is able to dial back to the SGC. Told that the Prometheus is being outfitted with Asgard hyperdrives capable of quickly returning them to the Pegasus Galaxy, members of the expedition return to Earth. However, their hopes of returning to Atlantis are shattered when they are informed that due to an accident aboard the Prometheus, they can't go back.

Now separated from Atlantis and stuck on Earth, the team finds strange changes in the things they see and encounter there; the friends and people they knew at the SGC are acting differently than expected.

Sheppard begins to suspect what is really going on, but how can he determine if he is correct?
Guest Stars: Don S. Davis as Lieutenant General George S. Hammond, Garwin Sanford as Simon Wallis, | Co-Guest Stars: Edmond Wong as Atlantis Technician, Robert K. Weiss as Scientist, Stephen Spender as Mitch, Nicole Rudell as Doctor, Lynda Riley as Brunette, Gary Jones (1) as Sgt. Walter Harriman, Noah Beggs as Dex
Director: Holly Dale
Writer: Paul Mullie, Joseph Mallozzi
 
10 :01x10 - The Storm (1) (Sep/17/2004)
A devastating storm occurring every twenty or thirty years is detected approaching Atlantis. The city is evacuated while McKay, Weir, and Sheppard initiate a plan to use the storm's lightning to power the shields. However, before they can finish, they are interrupted by the Genii, who plan to take over Atlantis.
Guest Stars: Colm Meaney as Cowen, Robert Davi (1) as Commander Acastus Kolya, Michael Puttonen as Smeadon, Erin Chambers as Sora, Ryan Robbins as Ladon, Paul McGillion as Dr. Carson Beckett, | Co-Guest Stars: David Nykl as Dr. Radek Zelenka, Cory Monteith as Genii Private, Jodie Graham as Genii Soldier, Conan Graham as Genii Soldier, Jason Diablo as Guard, Colin Corrigan as Guard #2, Steve Archer as Generator-Room Guard
Director: Martin Wood
Writer: Martin Gero
Story: Jill Blotevogel
 
11 :01x11 - The Eye (2) (Jan/21/2005)
With Weir and McKay held hostage by the Genii, Sheppard must figure out how to both rescue them and save Atlantis before the storm hits.
Guest Stars: Paul McGillion as Dr. Carson Beckett, Don Ackerman as Doran, Ryan Robbins as Ladon, Robert Davi (1) as Commander Acastus Kolya, Erin Chambers as Sora, | Co-Guest Stars: Conan Graham as New Genii Soldier, Jodie Graham as Genii Soldier, Steve Archer as Generator-Room Guard
Director: Martin Wood
Writer: Martin Gero
 
12 :01x12 - The Defiant One (Jan/28/2005)
After locating an Ancient defense satellite, Sheppard, McKay, and two scientists detect a Wraith distress signal coming from a nearby planet. They investigate but soon become trapped when an unstoppable Wraith prevents them from reaching their Puddle Jumper.
Guest Stars: Paul Magel as Dr. Abrams, Richard Ian Cox (3) as Dr. Brendan Gaul (as Richard Cox), | Co-Guest Stars: James Lafazanos as Male Wraith, Joseph May (1) as Sgt. Markham
Director: Peter DeLuise
Writer: Peter DeLuise
 
13 :01x13 - Hot Zone (Feb/04/2005)
When members of the expedition begin falling victim to a contagious nanite virus capable of causing death within hours, Atlantis goes into an automatic lockdown. [Read Recap below]
Guest Stars: Paul McGillion as Dr. Carson Beckett, Craig Veroni as Dr. Peter Grodin, | Co-Guest Stars: David Nykl as Dr. Radek Zelenka, Dean Marshall as Sgt. Bates, Dane MacFahden as Wagner (as Dane B. McFadhen), Damon Johnson as Peterson, Peter Grier as Hays, Allison Graham as Lt. Crown, Lindsay Collins as Dr. Biro, Nahanni Arntzen as Dumais, Michelle Addison as Johnson
Director: Mario Azzopardi
Writer: Martin Gero
 
14 :01x14 - Sanctuary (Feb/11/2005)
When Sheppard and his team are fleeing from the Wraith in a planet's orbit, an energy wave suddenly wipes the enemy out. Thinking the planet has a powerful weapon, the team investigates, finding a civilization untouched by the Wraith and living in perfect health. They then meet Chaya Sar, the planet's High Priestess, who tells them that it wasn't a weapon, but the work of the goddess Athar.
Guest Stars: Craig Veroni as Dr. Peter Grodin, Leonor Varela as Chaya Sar, Robert Thurston as Zarah, Paul McGillion as Dr. Carson Beckett
Director: James Head (1)
Writer: Alan Brennert
 
15 :01x15 - Before I Sleep (Feb/18/2005)
During a search of the city, the team finds a 10,000 year-old woman in suspended animation. Thinking she is an Ancient, they wake her up. However, she then reveals that she is Elizabeth Weir. [Read Recap below]
Guest Stars: Paul McGillion as Dr. Carson Beckett, Matthew Walker as Moros, Craig Veroni as Dr. Peter Grodin, Gildart Jackson as Janus, | Co-Guest Stars: Melia McClure as Female Ancient, David Nykl as Dr. Radek Zelenka, Bro Gilbert as Scientist, Alex DeCosta as Ancient Technician
Director: Andy Mikita
Writer: Carl Binder (1)
 
16 :01x16 - The Brotherhood (Feb/25/2005)
The team heads to one of the planets on the list of Ancient outposts, and with the help of the planet's inhabitants, they search for the ZPM. However, old foes show up and plan on taking the ZPM for themselves. [Read Recap below]
Guest Stars: Paul McGillion as Dr. Carson Beckett, Jana Mitsoula as Allina, Laura Mennell as Sanir, David Nykl as Dr. Radek Zelenka, Robert Davi (1) as Commander Acastus Kolya, | Co-Guest Stars: Dean Marshall as Sgt. Bates, Boyan Vukelic as Sgt. Stackhouse, Chuck Campbell (1) as Technician, Adrian Hough as Genii Lieutenant
Director: Martin Wood
Writer: Martin Gero
 
17 :01x17 - Letters from Pegasus (Mar/04/2005)
McKay figures out how to send a message back to the SGC, prompting the expedition members to film messages for their families.
Guest Stars: Paul McGillion as Dr. Carson Beckett, David Nykl as Dr. Radek Zelenka, Terence Kelly (1) as Orin, Gary Jones (1) as Sgt. Walter Harriman, Amanda Tapping as Lt. Colonel Samantha Carter, Ben Cotton as Dr. Kavanagh, | Co-Guest Stars: Manami Hara as Miko, Chuck Campbell (1) as Technician, Kevin Minato as Orin's Son, Dean Marshall as Sgt. Bates, Peter Graham-Gaudreau as Arja
Director: Mario Azzopardi
Writer: Carl Binder (1)
 
18 :01x18 - The Gift (Mar/11/2005)
Teyla begins to have vivid nightmares about the Wraith. Soon this starts affecting her duties. She becomes easily distracted, causing Sheppard to order her to see Dr. Heitmeyer. The session leads Teyla to consult an Athosian elder about her past. The information the elder gives her leads the team to investigate a strange planet where Teyla and her father once lived.

What they find there, and what Dr. Beckett subsequently finds out about Tayla through blood tests, shocks the small group, who learn of Teyla’s secret.
Guest Stars: Paul McGillion as Dr. Carson Beckett, Claire Rankin as Dr. Kate Heightmeyer, Ben Cotton as Dr. Kavanagh, David Nykl as Dr. Radek Zelenka, | Co-Guest Stars: Dean Marshall as Sgt. Bates, James Lafazanos as Male Wraith, Chuck Campbell (1) as Technician, Daniel Boileau as Cocoon Victim, | Uncredited: Jeffrey C. Robinson as Male Wraith, Bruce Woloshyn as Atlantis Expedition Engineer
Director: Peter DeLuise
Writer: Robert C. Cooper (3), Martin Gero
 
19 :01x19 - The Siege, Part 1 (Mar/18/2005)
With a group of Wraith hive ships on the way to Atlantis, the team searches for a place to flee and a way to destroy the city. McKay leads a team to try and activate the Ancients' orbital weapons platform.
Guest Stars: Christopher Heyerdahl as Halling, Craig Veroni as Dr. Peter Grodin, Paul McGillion as Dr. Carson Beckett, David Nykl as Dr. Radek Zelenka, | Co-Guest Stars: Chuck Campbell (1) as Technician, Dean Marshall as Sgt. Bates, James Lafazanos as Male Wraith, Craig Frazier as Atlantis Security Officer (as Craig Frazer), Rob Avery (1) as Lt. Miller
Director: Martin Wood
Writer: Martin Gero
 
20 :01x20 - The Siege, Part 2 (Mar/25/2005)
A new military contingent from Earth is sent to take command of Atlantis and defend it from the impending Wraith attack.
Guest Stars: Paul McGillion as Dr. Carson Beckett, David Nykl as Dr. Radek Zelenka, Clayton Landey as Colonel Dillon Everett, Christopher Britton as Prenum, | Co-Guest Stars: James Lafazanos as Male Wraith, Chuck Campbell (1) as Technician, David Orth as Captain
Director: Martin Wood
Writer: Paul Mullie, Joseph Mallozzi
 
Season 2
21 :02x01 - The Siege (Part 3) (Jul/15/2005)
As Lt. Aiden Ford recovers from his near-fatal encounter with a Wraith, the team races against time to save the city from an impending Wraith assault.
Guest Stars: Mitch Pileggi as Col. Steven Caldwell, Clayton Landey as Colonel Dillon Everett, Ellie Harvie (1) as Dr. Lindsey Novak, David Nykl as Dr. Radek Zelenka, | Co-Guest Stars: Trevor Devall as Hermiod (voice), Dean Marshall as Sgt. Bates, Ron Blecker as Marine, Heather Doerksen as Bridge Pilot, Kirby Morrow as Captain Dave Kleinman, Chuck Campbell (1) as Technician, James Lafazanos as Male Wraith, Andrew Hedge as Soldier
Director: Martin Wood
Writer: Martin Gero
 
22 :02x02 - The Intruder (Jul/22/2005)
A mysterious intruder has infected the Dadealus' computers with a virus that may allow them to take control of the ship.
Guest Stars: Lucia Walters as Lara, Garwin Sanford as Simon Wallis, Mitch Pileggi as Col. Steven Caldwell, David Nykl as Dr. Radek Zelenka, Beau Bridges as General Hank Landry, | Co-Guest Stars: Umar Gordon as Dr. Monroe, Heather Doerksen as Bridge Pilot, Trevor Devall as Hermiod (voice), Michael Boisvert as Bridge Lieutenant, Kimani Ray Smith as Dr. Lindstrom, Gerry Durand as Airman
Director: Peter DeLuise
Writer: Paul Mullie, Joseph Mallozzi
 
23 :02x03 - Runner (Jul/29/2005)
Ronon Dex, a fierce survivor of a Wraith attack, may be the team’s only hope in combating the now dangerous, Wraith-infected Ford.
Guest Stars: Kavan Smith (3) as Major Lorne, Mitch Pileggi as Col. Steven Caldwell, | Co-Guest Stars: Dan Payne as Lt. Reed, James Lafazanos as Male Wraith, Lucia Walters as Lara, Jonathon Young (1) as Dr. Parrish
Director: Martin Wood
Writer: Robert C. Cooper (3)
 
24 :02x04 - Duet (Aug/05/2005)
A technical glitch during their rescue from a Wraith ship forces McKay and Lt. Cadman to coexist inside McKay's body.
Guest Stars: David Nykl as Dr. Radek Zelenka, Jaime Ray Newman as Lt. Laura Cadman, Brenda James as Dr. Katie Brown, Kavan Smith (3) as Major Lorne, Claire Rankin as Dr. Kate Heightmeyer, | Co-Guest Stars: Jeffrey C. Robinson as Wraith Pilot, Tina-Jane Krohn as Scientist, Lloyd Bateman as Soldier (as Loyd Bateman)
Director: Peter DeLuise
Writer: Peter DeLuise, Martin Gero
 
25 :02x05 - Condemned (Aug/12/2005)
While investigating a new planet, the team is ambushed by villagers. However, a strange craft appears, and rescues them. They learn the planet has a thriving and advanced society, despite the Wraith threat. The SGA team learns that they had been attacked by the worst prisoners on the planet. The prison they arrived on is also the location of the planet’s Stargate

The team finds this strange, but when they find out the truth of this conundrum they are conflicted. Things then go horribly wrong as they attempt to return through the prison island’s gate to consult with Dr. Weir.
Guest Stars: Kyla Anderson as Marin, Darcy Belsher as Eldon, Christian Bocher as Torrell, Kavan Smith (3) as Major Lorne, Alan C. Peterson as Magistrate, | Co-Guest Stars: Nico McEown as Boy, James Lafazanos as Male Wraith, Chuck Campbell (1) as Technician
Director: Peter DeLuise
Writer: Carl Binder (1)
 
26 :02x06 - Trinity (Aug/19/2005)
McKay may have found a new and potent source of energy for Atlantis based on unperfected Ancient technology.
Guest Stars: Chuck Campbell (1) as Technician, Mitch Pileggi as Col. Steven Caldwell, David Nykl as Dr. Radek Zelenka, | Co-Guest Stars: Chris Gauthier as Mattas, Mark Pawson as Collins, Terry Howson as Kell, Mark Hoeppner as Bartender, Barry Greene as Hendon, Sean Campbell (1) as Solen
Director: Martin Wood
Writer: Damian Kindler
 
27 :02x07 - Instinct (Aug/26/2005)
Team finds a planet that has had almost no Wraith culling in the last ten years, or since the time a Wraith ship crash there. However, they are told that one or two survivors must still be alive, as occasionally a villager dies in a culling way. Sheppard offers his teams help to kill the last of the Wraith for them, only to discover when they it, it is a young Wraith female, and she is with the villager who has been protecting her, and acting as her father. The team becomes intrigued by this pair when the father says the deaths could not have been from his daughter, as he has invented a drug that blocks a Wraith’s need to cull on humans.
Guest Stars: Jewel Staite as Ellia, Stephen Dimopoulos (1) as Goran, John Innes as Zaddik, | Co-Guest Stars: Jeffrey C. Robinson as Male Wraith (as Jeffrey Robinson), Blake Stadel as Young Zaddik, Kayma Seamark as 6 Year Old Wraith, Nico McEown as Boy, Tanya Champoux as Screaming Woman, Tom Bates as Barkeep
Director: Andy Mikita
Writer: Treena Hancock, Melissa R. Byer
 
28 :02x08 - Conversion (Sep/09/2005)
The team races to find a cure for the retrovirus that is mutating Sheppard into a Wraith.
Guest Stars: Kavan Smith (3) as Major Lorne, Mitch Pileggi as Col. Steven Caldwell, | Co-Guest Stars: France Perras as Nurse, Andy Nez as Sheppard's Guard, Matthew Harrison (1) as Scientist #1, Todd Hann as Bravo Leader, Lindsay Collins as Scientist #2
Director: Brad Turner (1)
Writer: Martin Gero
 
29 :02x09 - Aurora (Sep/23/2005)
The Atlantis team discovers a derelict Ancient spacecraft where the crew is in stasis. They attempt to awaken the crew, but find the Wraith have something to say about this. The question is whether the team can extricate themselves from this revival processes, and remove the Wraith from the equation.
Guest Stars: Mitch Pileggi as Col. Steven Caldwell, | Co-Guest Stars: David Nykl as Dr. Radek Zelenka, Ryan W. Smith (3) as Crewman, Anne Openshaw as Aurora First Officer, Kirby Morrow as Airman, James Lafazanos as Male Wraith, Graham Kosakoski as Aurora Guard, Pascale Hutton as First Officer, Bruce Dawson as Captain
Director: Martin Wood
Writer: Carl Binder (1)
 
30 :02x10 - The Lost Boys (1) (Sep/23/2005)
Ford, who has survived being beamed aboard a Wraith ship, captures Col. Sheppard and his team. Ford has a daring plan to attack and destroy a Wraith Hive ship, and needs Col. Sheppard and McKay’s knowledge and expertise to pull off the plan. Ford now has a following of converts who are also taking the Wraith enzymes, making them super soldiers too. What the Atlantis team doesn’t realize is, Ford has a plan that will require them to help him, or one of them will die. Things then go horribly wrong, leaving the team in a certain death situation. One must wait for part two to see if and how the team can survive Ford and his team and the Wraith!
Guest Stars: Rainbow Sun Francks as Lt. Aiden Ford, Kavan Smith (3) as Major Lorne, David Nykl as Dr. Radek Zelenka, Aaron Abrams as Kanayo, Paul Anthony (1) as Jace, | Co-Guest Stars: Aleks Holtz as Guard #2, Mitch Pileggi as Col. Steven Caldwell, Andee Frizzell as Wraith Hive Queen, James Lafazanos as Male Wraith, Woody Jeffreys as Guard #1
Director: Brad Turner (1)
Writer: Martin Gero
 
31 :02x11 - The Hive (2) (Jan/06/2006)
After being captured during a failed attempt to destroy a Wraith hive ship, Ford, Sheppard, Teyla, Ronin, and some of Ford’s team try to figure a way out of their mess. McKay, who was left behind by Ford as insurance, tries to help the situation by taking a large dose the Wraith enzyme. This leads to a miss direction by the Wraith to Sheppard, and a battle between the Daedalus and two, not one, Wraith hive ship. Sheppard has a plan, but will it work before the Wraith destroy him, his team, or the Daedalus?
Guest Stars: Rainbow Sun Francks as Lt. Aiden Ford, Jenn Bird as Neera, Andee Frizzell as Hive Queen, Kirby Morrow as Airman, Chuck Campbell (1) as Technician, Aleks Holtz as Guard, Woody Jeffreys as Bouncer, David Nykl as Dr. Radek Zelenka, Mitch Pileggi as Col. Steven Caldwell, James Lafazanos as Male Wraith, Aaron Abrams as Kanayo
Director: Martin Wood
Writer: Carl Binder (1)
 
32 :02x12 - Epiphany (Jan/13/2006)
The team discovers a portal on a distant planet that pulls Sheppard to another world, where he encounters a dangerous creature. Back on the other side, McKay learns troubling news about the portal.
Guest Stars: Nicole Munoz as Hetta, Chad Morgan as Tir, David McNally (1) as Avrid
Director: Neill Fearnley
Writer: Joe Flanigan, Brad Wright (1)
 
33 :02x13 - Critical Mass (Jan/20/2006)
Atlantis is threatened by a bomb planted by the Goa'uld. Meanwhile, two Wraith cruisers are on course for the ancient city and a saboteur is unmasked.
Guest Stars: Peter Flemming (1) as Agent Malcolm Barrett, Bill Dow as Dr. Bill Lee, Ellie Harvie (1) as Dr. Lindsey Novak, Ben Cotton as Dr. Kavanagh, Mitch Pileggi as Col. Steven Caldwell, David Nykl as Dr. Radek Zelenka, Jaime Ray Newman as Lt. Laura Cadman, Gary Jones (1) as Sgt. Walter Harriman, Beau Bridges as Major General Hank Landry
Director: Andy Mikita
Writer: Carl Binder (1), Brad Wright (1)
Songs: Rachel Lutrell -- Beyond The Night
 
34 :02x14 - Grace Under Pressure (Jan/27/2006)
McKay finds himself trapped in a Puddle Jumper which has crashed into the ocean and is sinking to the bottom. Col. Sheppard must not only locate McKay and the sinking missing Jumper before it’s too late, but also must figure out a rescue strategy to reach the Jumper at the depths to which it is sinking.
Guest Stars: David Nykl as Dr. Radek Zelenka, Nimet Kanji as Dr. Bryce, | Guest Hosts: Amanda Tapping as Lt. Colonel Samantha Carter
Director: Martin Wood
Writer: Martin Gero
 
35 :02x15 - The Tower (Feb/03/2006)
Maj. Sheppard’s team travels to another planet in hope of finding an advanced technologic society to fight the Wraith, only to find another agrarian society. However, they do find the planet holds the one thing (well, several things) that they really need for Atlantis!

However, the Lord Chamberlain of the ruler of the planet machinations put Maj. Sheppard and his team in jeopardy. Only McKay can prevent their demise. But his work endangers him, one of the town folk, the team, and the Tower!

Will they survive?
Guest Stars: Chelan Simmons as Mara, Brendan Beiser as Tavius, David Bloom (1) as Eldred, Jay Brazeau as Lord Protector, Peter Woodward as Otho, Richard Kahan as Baldric, | Co-Guest Stars: Mark Gibbon as Constable, Anna Cummer as Petra
Director: Andy Mikita
Writer: Joseph Mallozzi, Paul Mullie
 
36 :02x16 - The Long Goodbye (Feb/10/2006)
Two pods are discovered that contain the minds of alien beings, who take control of Weir and Sheppard's bodies to continue their personal war.
Guest Stars: Mitch Pileggi as Col. Steven Caldwell, Kavan Smith (3) as Major Lorne
Director: Andy Mikita
Writer: Damian Kindler
 
37 :02x17 - Coup d'Etat (Feb/17/2006)
Ladon, a Genii scientist who was involved with the Genii’s attempt to capture Atlantis (S1E11: The Eye), contacts the SGA team to coerce them into helping him overthrow the Genii government he had been serving. His enticement is a zero point module that he has in his possession. The team decides it is worth risking the uneasy truce between the SGA and the Genii to acquire the ZPM. But, can they trust Ladon to keep his promise? Strangely, the SGA team finds they have their own ace card to play, when things start to go horribly wrong.

To make matters worse, Maj. Lorne has gone missing while on an away mission. Telya and Ronon are sent to try and find out what happened to him.
Guest Stars: Kavan Smith (3) as Major Lorne, Ryan Robbins as Ladon Radim, Colm Meaney as Cowen, Sonja Bennett as Dahlia Radim, | Co-Guest Stars: Jon Johnson (1) as Security Team Member, Dan Joffre as Barkeep, Penelope Corrin as Dr. Lindsay, Chuck Campbell (1) as Technician, Meg Roe as Young Bar Keep
Director: Martin Wood
Writer: Martin Gero
 
38 :02x18 - Michael (Feb/24/2006)
A man is being treated by Dr. Beckett who apparently has amnesia. As he slowly recovers his memory, a major secret is revealed. Also, the secret that Atlantis was not destroyed and Teyla’s life both become imperilled.
Guest Stars: Connor Trinneer as Michael Kenmore, Claire Rankin as Dr. Kate Heightmeyer, | Co-Guest Stars: James Lafazanos as Male Wraith, Doug Chapman (1) as Sgt. Cole, Chuck Campbell (1) as Technician, Gerry Durand as Sergeant
Directors: Peter DeLuise, Martin Wood
Writer: Carl Binder (1), Martin Gero, Robert C. Cooper (3)
 
39 :02x19 - Inferno (Mar/03/2006)
With no way out and trapped on a planet with a volcano, it is up to Dr. McKay to find a way to get the team out of there.
Guest Stars: Kevin McNulty as Chancelor Lakus, Mitch Pileggi as Col. Steven Caldwell, Brandy Ledford as Narina, David Nykl as Dr. Radek Zelenka
Director: Peter DeLuise
Writer: Carl Binder (1)
 
40 :02x20 - Allies (1) (Mar/10/2006)
The Wraith, or at least one Hive ship, knows of Atlantis’ survival. They learn Michael is on the ship, and finally communicate with him. He tells them that too many Wraith awoke to too few humans, and a civil war then broke out amongst the Wraith.

Michael’s faction wants to get a hold of Dr. Beckett’s retro virus in order to fight the other Wraith factions. They say they can survive by feeding on Wraith who have been converted to humans. Although the Atlantis team is reluctant to believe the Wraith’s motives, they must take the risk to help Wraith in killing other Wraith.

Things go horribly wrong, as the SGA finds the Wraith ship has a totally different agenda. Can Atlantis survive this betrayal? Things look dire for Atlantis! After all, they have given away their Wraith killing information, as well as the fact the Wraith know that Atlantis still exists.
Guest Stars: Mitch Pileggi as Col. Steven Caldwell, Connor Trinneer as Michael Kenmore, David Nykl as Dr. Radek Zelenka, Brent Stait as Michael Kenmore, | Co-Guest Stars: Kirby Morrow as Airman, Andee Frizzell as Hive Queen, James Lafazanos as Male Wraith, Sheri Noel as Lab Assistant
Director: Andy Mikita
Writer: Martin Gero
 
Season 3
41 :03x01 - No Man's Land (2) (Jul/14/2006)
With the Wraith ships headed for Earth, Sheppard must find a way to rescue Ronon and McKay. Meanwhile, the IOA makes life hard for Dr. Weir.
Guest Stars: Tamlyn Tomita as Chinese Ambassador Shen Xiaoyi, Andy Maton as English Ambassador, Beau Bridges as General Hank Landry, David Nykl as Dr. Radek Zelenka, Scott Heindl as Wraith, Mitch Pileggi as Col. Steven Caldwell, Gary Jones (1) as Sgt. Walter Harriman, Christopher Heyerdahl as Male Wraith, Brahm Taylor as Lathan / Wraith, Kavan Smith (3) as Major Lorne, Robert Picardo as Richard Woolsey, Connor Trinneer as Michael Kenmore, | Co-Guest Stars: Kirby Morrow as Airman, Andee Frizzell as Wraith Queen, Angelique Naude as Young Female Scientist
Director: Martin Wood
Writer: Martin Gero
 
42 :03x02 - Misbegotten (3) (Jul/21/2006)
As the Hive ship arrives above Atlantis, everyone is happy to find that Col. Sheppard and team are in control. However, the Wraith crew, now turned back in to humans using Dr. Becket’s gas, must be dealt with in some way.

Michael, who now has separately been reverted back to his human form, and the reverted Wraith crew, are relocated to an unpopulated planet which lacks even a stargate. Dr. Beckett then refuses to leave the planet until he is sure the former Wraith won’t revert back to their former state, as Col. Sheppard and team plan to leave back for Atlantis.

At the same time, IOA Agent Richard Woolsey travels back to Atlantis with Dr. Weir to evaluate her command there.

Things do not go as planned, and Dr. Beckett's life becomes endangered. Sheppard and his team must take the crippled Hive ship back to try to rescue him, as a second Wraith ship approaches the planet Dr. Beckett was left on.
Guest Stars: Brahm Taylor as Lathan / Wraith, Christopher Heyerdahl as Wraith, Gary Jones (1) as Sgt. Walter Harriman, Scott Heindl as Wraith, Mitch Pileggi as Col. Steven Caldwell, Robert Picardo as Agent Richard Woolsey, Connor Trinneer as Michael Kenmore / Wraith, | Co-Guest Stars: Kirby Morrow as Daedalus Tech, Chuck Campbell (1) as Atlantis Technician, Emy Aneke as Lt. Morrison
Director: Martin Wood
Writer: Joseph Mallozzi, Paul Mullie
 
43 :03x03 - Irresistible (Jul/28/2006)
As Sheppard’s team searches for unused gates to build an easier and faster path back to the Milky Way, they happen on a simple agrarian culture on a planet with an unused orbital gate. There the find Lucius, a town folk who seems to be extremely loved by all those around him. When Dr. Beckett later brings Lucius back to Atlantis unannounced, things there become strange too. Lucius seems to be able to control everyone in Atlantis, except for Col. Sheppard, who has had a recent cold.

Sheppard must find a way to overcome Lucius’ control over the crew, before he becomes a target for opposing their new guest.
Guest Stars: Julia Anderson as Willa, David Nykl as Dr. Radek Zelenka, Richard Kind as Lucius Lavin, | Co-Guest Stars: Chuck Campbell (1) as Atlantis Technician, Lisa Marie Caruk as Heleen
Director: Martin Wood
Story: Brad Wright (1), Robert C. Cooper (3) | Teleplay: Carl Binder (1)
 
44 :03x04 - Sateda (Aug/04/2006)
Ronon and the team visit a friendly planet, only to find it unfriendly to Ronon, as Ronon brought the wrath of the Wraith down upon them, when they took Ronon in years before while he was a runner. The villagers plan to send them to the Wraith as a sacrifice, as the Wraith has promised not to cull them if they do. Ronon is finally able to get the villagers to at least send his friends back to Atlantis.

The team later returns with reinforcements, but Ronon is gone and the village destroyed. Meanwhile, Ronon has been re-implanted with a Wraith tracking device and dropped on the ruins of his home world “Sateda,” with the Wraith chasing him again as a Runner.

Ronon also begins to experience flashbacks to his past on Sateda, and to the earlier Wraith attacks there. Even as the Atlantis team searches for him, Ronon has plans of his own, and a goal he has set to attain for himself, before he can be allowed to be killed by his trackers.
Guest Stars: Kavan Smith (3) as Major Lorne, Mitch Pileggi as Col. Steven Caldwell, Chiara Zanni as Molina, Frank Collison as Keturah, | Co-Guest Stars: Dan Payne as Big Wraith, David Pauls as Aton, Chuck Campbell (1) as Technician, Todd Scott as Malik, Alexandra Carter as Linor, John Stewart as Villager
Director: Robert C. Cooper (3)
Writer: Robert C. Cooper (3)
 
45 :03x05 - Progeny (Aug/11/2006)
Atlantis discovers one of the Ancients’ abandoned research outposts, that turns out not to be abandoned.
However, they find they have found a Replicator community living in an even greater “Atlantis like" city, part of which also has the capable of space flight. The learn the Replicators have always wanted to emulate the Ancients, and have also wanted to exceed them. However, they want, but can’t duplicate the Ancients’ final step of ascending.

Now the Atlantis team must escape these Replicators, but not before they also extract the knowledge they have to defeat the Wraith.
Guest Stars: David Ogden Stiers as Oberoth, John O'Callaghan as Niam, | Co-Guest Stars: Chuck Campbell (1) as Technician
Director: Andy Mikita
Writer: Carl Binder (1)
Story: Robert C. Cooper (3)
 
46 :03x06 - The Real World (Aug/18/2006)
Dr. Weir awakens in a psychiatric hospital only to be told her memories of the last two years of her life were false; just a figment of a psychotic episode she has had over the last two days, after collapsing after a treaty negotiation. Even a visit by Gen. O’Neill to tell her that Stargate Command and an off world Atlantis doesn’t really exist, doesn’t convince her. Then, strange events and changes she sees at the hospital cause her even more doubt about if what is going on around her is really real.

Can she discover the truth of her situation, and can the people she thinks are real back in Atlantis; rescue her from this seeming nightmare?
Special Guest Stars: Richard Dean Anderson as Major General Jack O'Neill, | Guest Stars: Alan Ruck as Dr. Fletcher, John O'Callaghan as Niam, Christina Jastrzembska as Dr. Weir's Mother, | Co-Guest Stars: Christian Lattman as Shadowy Figure, Michelle Brezinski as Nurse, Gina Stockdale as Rnid
Director: Paul Ziller
Writer: Carl Binder (1)
 
47 :03x07 - Common Ground (Aug/25/2006)
In a convoluted plot to regain power over the Genii, former Commander Kolya captures Col. Sheppard, in order to bargain for the capture of the Genii Ladon. Strangely, Sheppard is able to find an ally in the person being used to scare Atlantis into turning over Ladon, that being the Wraith Kolya is allowing to feed on Sheppard every three hours, a Wraith.
Guest Stars: Christopher Heyerdahl as Wraith, Ryan Robbins as Ladon, Robert Davi (1) as Ex-Commander Acastus Kolya, | Co-Guest Stars: Chuck Campbell (1) as Technician, Paul Lazenby as Genii Soldier, Geoff Redknap as Old Colonel Sheppard
Director: William Waring
Writer: Ken Cuperus
 
48 :03x08 - McKay and Mrs. Miller (Sep/08/2006)
In a strange twist, McKay’s sister, an accomplished scientist and now a “stay at home” mother, may have found the solution to creating new ZPMs with out knowing it. But McKay’ sister, Jeannie, is reluctant to either assist the military, or help out her brother, whom she has not heard from for over four years.

However, once onboard, McKay and Jeannie put her theoretical physics formulae into practice. The problem is the process that will give them a new power source will also produce “dangerous exotic particles.” Jeannie’s theorem could allow for these dangerous exotic particles to be sent instead to a parallel universe; one that the odds are will be uninhabited, hence not endangering this universe.

During the start up test phase, they are surprised to receive the “McKay” from the parallel universe they are targeting. He tells them that the exotic particles being generated, are about to destroy his universe.

The team must find a way to fix this error, which could also endanger their own universe. At the same time, McKay must also put up with the nicer parallel version of himself, and also try to repair the tension that has existed between him and his sister.
Guest Stars: David Nykl as Dr. Radek Zelenka, Kate Hewlett as Jeannie McKay Miller, Amanda Tapping as Lt. Colonel Samantha Carter, | Co-Guest Stars: Trevor Devall as Hermiod, Sheri Noel as Scientist, Brendan Gall as Kaleb, Madison Bell as Madison
Director: Martin Wood
Writer: Martin Gero
 
49 :03x09 - Phantoms (Sep/15/2006)
When Sheppard leads a team to find another overdue off-world team, they find the team members are all dead, except for their C.O., who is still missing. They’ve all been shot numerous times with their own weapons. They also find the decaying remains of several Genii soldiers, who have also died violent deaths, some months before. When Sheppard’s team try to return to Atlantis with their dead, they find the DHD has been rigged to explode, which leaves them stranded on this dangerous planet. It appears that an unusual device they have found, which is emitting strange EM pulses, may be the cause of the hallucinations they are all starting to have. However, can they fight off these hallucinations which were the cause of their comrades’ deaths, long enough for McKay to figure out how to turn off the mysterious device?
Guest Stars: Dexter Bell as Sgt. Barraso, Colby Johannson as Lt. Kagan, David Nykl as Dr. Radek Zelenka, Nels Lennarson as Holland, | Co-Guest Stars: Anna Williams as Female Tech, Patrick Sabongui as Taliban Guard, Gidon Karmel as Major Leonard, Dan Payne as Super Soldier
Director: Martin Wood
Writer: Carl Binder (1)
 
50 :03x10 - The Return (1) (Sep/22/2006)
While Atlantis and Earth successfully test a “multiple gate” bridge between their two galaxies, the Daedalus detects another ship. When they try to make contact with the ship, the ship drops out of its time dilated hyper-warp. They learn it is a Lantian war ship returning from a long journey, headed back to Atlantis.

When the Lantian crew learns that all their people had all left Atlantis ten thousand years ago, and that they are the only ones that remain, they politely ask the SGA crew evacuate back to Earth. Gen. O’Neill and Richard Woolsey arrive in Atlantis to try to negotiate with the Lantians, but they are reluctantly forced to agree to leave Atlantis, while Ronon and Teyla decide to stay behind in the Pegasus galaxy.

However, the newly found Latians turn out to be overly confident on their ability to control an impending attack by the Asuran Replicators. Gen. O’Neill and Woolsey then become trapped on Atlantis; as Sheppard, Weir and the rest of SGA break rank with the SGC to try to rescue them and defeat the Replicators’ attack on Atlantis.

Dr. McKay can get them back into the heart of Atlantis, but what sort of resistance will they encounter?
Special Guest Stars: Richard Dean Anderson as Major General Jack O'Neill, | Guest Stars: Megan Leitch as Captain Helia, David MacInnis as Talus, Panou as Cetus, Gary Jones (1) as Sgt. Walter Harriman, David Nykl as Dr. Radek Zelenka, Ryan Robbins as Ladon, Beau Bridges as General Hank Landry, Mitch Pileggi as Col. Steven Caldwell, Robert Picardo as Richard Woolsey, Bill Dow as Dr. Bill Lee, | Co-Guest Stars: Elias Toufexis as Replicator Tech, James Chutter as Babbis, Andrew Moxham as Wallace, Chuck Campbell (1) as Atlantis Technician, Kirby Morrow as Daedalus Tech
Director: Brad Turner (1)
Writer: Martin Gero
 
51 :03x11 - The Return (2) (Apr/13/2007)
Sheppard and his team, along with Weir and Beckett, arrive in the Asuran's city and destroy the Replicators' stargate operations. The team then escapes, and tries to reprogram a Replicator that had been left floating in space, in order to freeze all the Replicators, so they can rescue O'Neill and Woolsey. However, after O'Neill and Woolsey are captured, the team must come up with a plan B. as plan A has failed. The team goes about this new plan and feeds Woolsey misinformation, as they suspect he will be probed by the Replicators. But will this new plan succeed where their original one failed? Time is against them.
Special Guest Stars: Richard Dean Anderson as Major General Jack O'Neill, | Guest Stars: Beau Bridges as Major General Hank Landry, Mitch Pileggi as Col. Steven Caldwell, Panou as Cetus, David MacInnis as Talus, Gary Jones (1) as Sgt. Walter Harriman, Bill Dow as Dr. Bill Lee, John O'Callaghan as Niam, Robert Picardo as Richard Woolsey, | Co-Guest Stars: Elias Toufexis as Replicator, Kirby Morrow as Daedalus Tech, Kerry Blouin as Replicator Guard, Patrick Lambier as Replicator Guard
Director: Brad Turner (1)
Writer: Martin Gero
 
52 :03x12 - Echoes (Apr/20/2007)
When McKay finds his “whale” circling the floating city, strange events begin to occur. Teyla begins to see people that aren’t there. Then Weir begins to see the same people too. Soon everyone begins to see visions of Ancients who appear to be in distress. Can the arrival of McKay’s whale be connected to these visions? Can the visions the team are seeing forebode an impending event? Also, can the team make sense of the weird voices they are hearing during their visions, in order to understand the unknown danger in front of them? McKay’s answer leads to a daring plan by Sheppard that might just possibly save all the biological life on the planet.
Guest Stars: Claire Rankin as Dr. Kate Heightmeyer, David Nykl as Dr. Radek Zelenka, Mitch Pileggi as Col. Steven Caldwell, | Co-Guest Stars: Patricia Nudd as Ancient Woman, Amanda Burke as Ancient Scientist, Michael Chase as Ancient Med Tech, David Quinlan as Ancient Scientist, David Neale (1) as Ancient Pilot
Director: William Waring
Writer: Carl Binder (1)
Story: Brad Wright (1)
 
53 :03x13 - Irresponsible (Apr/27/2007)
Sheppard and his team head to a planet to investigate reports of a "superhero" in hopes this person might help in their struggle with the Wraith. What they find is a person they have had to unfortunately deal with in the past. However, soon after this meeting, an even worse foe turns up when word spreads that Sheppard is on the planet.
Guest Stars: Richard Kind as Lucius Lavin, Dean Wray as Haemon, Meredith McGeachie as Wench, Robert Davi (1) as Kolya, | Co-Guest Stars: Adam Bergquist as Amiris, Jon Cuthbert (1) as Fortnum, Ashley O'connell as Fruit Stand Owner
Director: Martin Wood
Writer: Joseph Mallozzi, Paul Mullie
 
54 :03x14 - Tao of Rodney (May/04/2007)
While trying to find ways to conserve power in Atlantis, Rodney stumbles upon a room that is using large amounts of power. In an attempt to shut it down he gets hit with a beam and starts developing super powers.
Guest Stars: Kavan Smith (3) as Major Lorne, David Nykl as Dr. Radek Zelenka, | Co-Guest Stars: Leela Savasta as Esposito, Donna Soares as Coleman, Chuck Campbell (1) as Technician
Director: Martin Wood
Writer: Damian Kindler
 
55 :03x15 - The Game (May/11/2007)
Major Lorne investigates a planet where one civilization has pictures of McKay, and SGA soon realizes it is connected to an Atlantis control room that McKay and Sheppard had found and thought was just a game room. SGA soon realizes the game room was really an experimental Ancient control room which controls the planet. McKay and Sheppard find that their war game has been affecting the real people on the planet for the last few years. Now Sheppard and McKay must convince both sides that their planet’s struggle was a mistake that they both mistakenly caused. However, they soon learn that they may have led these people into all out war with the technology they mistakenly provided.
Guest Stars: Laura Harris as Nola, David Dayan Fisher (3) as Baden, Kavan Smith (3) as Major Lorne, David Nykl as Dr. Radek Zelenka, | Co-Guest Stars: James Long as Helkin, John Shaw as Garth
Director: William Waring
Story: Holly Henderson, Don Whitehead | Teleplay: Carl Binder (1)
 
56 :03x16 - The Ark (May/18/2007)
Sheppard’s team discovers a space station filled with humans locked in a transporter module for hundreds of years. They bring two of them out of status, Jamus and Herick, and are told the survivors 'froze" themselves in the hopes of outliving the Wraith who were attacking them. However, an explosion causes the station to fall out of orbit and traps the team throughout the base.
Guest Stars: Kenneth Welsh as Jamus, Joris Jarsky as Herick, Kavan Smith (3) as Major Lorne, | Co-Guest Stars: Chuck Campbell (1) as Technician, Gerry Durand as Marine
Director: Martin Wood
Story: Scott Nimerfro, Ken Cuperus | Teleplay: Ken Cuperus
 
57 :03x17 - Sunday (Jun/01/2007)
It's a typical Sunday in Atlantis and everyone is going about their daily lives. A handsome scientist, Dr. Branton, who is smitten with Dr. Weir is trying to convince her to go to lunch with him. Although Dr. Weir has a personal rule against dating the people under her command, he persuades her to just "have lunch" with him.

During lunch, Dr. Branton kisses Dr. Weir and she becomes attracted to him, but she decides she can't allow anything to come of this; then the control tower reports that there was an explosion and three people are dead and many injured, and it is believed to have been a bomb.
Guest Stars: Matthew Del Negro (1) as Mike Branton, Kavan Smith (3) as Major Lorne, David Nykl as Dr. Radek Zelenka, Brenda James as Dr. Katie Brown, Caroline Cave as Dr. Cole, | Co-Guest Stars: Lara Gilchrist as Dr. Hewston, Daniel Bacon as Dr. Watson, Lindsay Collins as Dr. Biro, Chuck Campbell (1) as Technician, Linda Ko as Nurse, Pearce Visser as Opponent, Brandy Heidrick as Pretty Marine
Director: William Waring
Writer: Martin Gero
 
58 :03x18 - Submersion (Jun/08/2007)
While exploring an ancient drilling platform that could provide Atlantis with more power, the team gets cut off from the jumper and there might be a Wraith after them.
Guest Stars: David Nykl as Dr. Radek Zelenka, | Co-Guest Stars: Andee Frizzell as Wraith Queen, Michael Tayles as Dr. Graydon, Noel Johansen as Dr. Dickenson, Donna Soares as Coleman
Director: Brenton Spencer (2)
Writer: Ken Cuperus
 
59 :03x19 - Vengeance (Jun/15/2007)
When Atlantis loses contact with people on Taranis, Weir sends Sheppard and team to investigate. At first they find no life signs, but as they investigate further it appears there is at least one life sign deep underground. Their investigation soon leads them to an old foe’s horrific research which could soon alter the balance of power balance in the galaxy, leaving all humans in an even greater peril than from even the Wraith.
Guest Stars: Connor Trinneer as Michael Kenmore / Wraith, | Co-Guest Stars: Chuck Campbell (1) as Technician, Ryan Booth as Lt. Negley, Samuel Polin as Creature, Brian Ho as Stunt Creature, Josh Blacker as Screaming Man
Director: Andy Mikita
Writer: Carl Binder (1)
 
60 :03x20 - First Strike (1) (Jun/22/2007)
A failed attack on a Replicator armada forces McKay to follow in the footsteps of the Ancients, millenia before, and take a drastic step to save Atlantis from destruction.
Guest Stars: Michael Beach as Col. Abe Ellis, Jewel Staite as Dr. Jennifer Keller, Kavan Smith (3) as Major Lorne, David Nykl as Dr. Radek Zelenka, David Ogden Stiers as Oberoth, | Co-Guest Stars: Chuck Campbell (1) as Technician, Heather Doerksen as Apollo Tech, Donna Soares as Coleman, Jay Williams as Adams
Director: Martin Wood
Writer: Martin Gero
 
Season 4
61 :04x01 - Adrift (2) (Sep/28/2007)

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Season 4 begins as Dr. Weir clings to life and Dr. McKay tries to save Atlantis, which is badly damaged and lost in space after the Replicator attack.
Guest Stars: Jewel Staite as Dr. Jennifer Keller, David Nykl as Dr. Radek Zelenka, Bill Dow as Dr. Bill Lee, Michael Beach as Col. Abe Ellis, Torri Higginson as Dr. Elizabeth Weir, | Co-Guest Stars: Rick Wong as Med Tech
Director: Martin Wood
Writer: Martin Gero
 
62 :04x02 - Lifeline (3) (Oct/05/2007)
Sheppard leads the crew on a mission the core of the Replicator home world. Meanwhile, Samantha Carter is in a race against time to locate Atlantis.
Special Guest Stars: Torri Higginson as Dr. Elizabeth Weir, | Guest Stars: Michael Beach as Col. Abe Ellis, David Nykl as Dr. Radek Zelenka, Bill Dow as Dr. Bill Lee, David Ogden Stiers as Oberoth
Director: Martin Wood
Writer: Carl Binder (1)
 
63 :04x03 - Reunion (Oct/12/2007)
Two years since Ronon Dex learned that a small handful of his people escaped the destruction of his home world Sateda the team encounter some of Ronon's own friends and fellow soldiers who for many years he thought they were killed during a mission to attack the Wraith directly.
Guest Stars: Christopher Judge as Teal'c, David Nykl as Dr. Radek Zelenka, Scott Heindl as Male Wraith, Aleks Paunovic as Rakai, Kyra Zagorsky as Ara, Mark Dacascos as Tyre, | Co-Guest Stars: Arran Landry as Townsperson, Rob Avery (1) as Lt. Miller, Byron Lucas as Replicator
Director: William Waring
Writer: Paul Mullie, Joseph Mallozzi
 
64 :04x04 - Doppelganger (Oct/19/2007)

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Lt. Col. Sheppard touches a crystalline entity causing dreams to become reality and dangerous.
Guest Stars: Jewel Staite as Dr. Jennifer Keller, Claire Rankin as Dr. Kate Heightmeyer, David Nykl as Dr. Radek Zelenka, Kavan Smith (3) as Major Lorne, | Co-Guest Stars: Linda Ko as Nurse, Yee Jee Tso as Technician
Director: Robert C. Cooper (3)
Writer: Robert C. Cooper (3)
 
65 :04x05 - Travelers (Oct/26/2007)

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Colonel Sheppard is is captured by the nomadic inhabitants of a fleet of spaceships who wish to use him for their own needs.
Guest Stars: Jill Wagner as Larrin, Kavan Smith (3) as Major Lorne, Sean Rogerson as Nevik, Michael Cram as Silas, Scott Heindl as Male Wraith, | Co-Guest Stars: Chris Kalhoon as Crewman
Director: William Waring
Writer: Joseph Mallozzi, Paul Mullie
 
66 :04x06 - Tabula Rasa (Nov/02/2007)

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The crew suffers from amnesia after plant samples from their new home planet unleash a virus that affects everyone except Teyla and Ronon.
Guest Stars: Jewel Staite as Dr. Jennifer Keller, David Nykl as Dr. Radek Zelenka, Kavan Smith (3) as Major Lorne, Brenda James as Dr. Katie Brown, Zach Selwyn as Scientist, | Co-Guest Stars: Niall Matter as Lt. Kemp, Linda Ko as Nurse
Director: Martin Wood
Writer: Alan McCullough
 
67 :04x07 - Missing (Nov/09/2007)

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Teyla and Dr. Keller discover an abandoned Athosian settlement and a hostile warrior tribe on New Athos.
Guest Stars: Jewel Staite as Dr. Jennifer Keller, Johann Helf as Nabel Gohen, Danny Trejo as Omal, | Co-Guest Stars: Glenn Ennis as 1st Warrior
Director: Andy Mikita
Writer: Carl Binder (1)
 
68 :04x08 - The Seer (Nov/16/2007)

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A psychic visitor delivers a dark forecast for the outpost while at Atlantis. Meanwhile, the Wraith propose an alliance to stop the Replicators, which are annihilating inhabited planets to eliminate the Wraith food supply.
Guest Stars: Martin Jarvis as Davos, Christopher Heyerdahl as Wraith Leader, Jewel Staite as Dr. Jennifer Keller, Kimberley Warnat as Linara, Robert Picardo as Richard Woolsey, | Co-Guest Stars: Chuck Campbell (1) as Technician
Director: Andy Mikita
Writer: Alan McCullough
 
69 :04x09 - Miller's Crossing (Nov/30/2007)

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The Atlantis team responds when Dr. Rodney McKay's sister, Jeanie Miller, is kidnapped while on Earth.
Guest Stars: Kate Hewlett as Jeannie McKay Miller, Christopher Heyerdahl as Wraith Leader, Peter Flemming (1) as Agent Malcolm Barrett, David Nykl as Dr. Radek Zelenka, Gary Jones (1) as Sgt. Walter Harriman, Brendan Gall as Kaleb Miller, Steven Culp as Henry Wallace, | Co-Guest Stars: Madison Bell as Madison, Mark Gash as Doctor, Sheri Noel as Scientist
Director: Andy Mikita
Writer: Martin Gero
 
70 :04x10 - This Mortal Coil (1) (Dec/07/2007)

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A strange drone crashes into Atlantis, heralding a dreadful new predicament when Replicator doubles of the Atlantis team offer to help defend the city from the Wraith.
Guest Stars: Torri Higginson as Dr. Elizabeth Weir, Jewel Staite as Dr. Jennifer Keller, David Nykl as Dr. Radek Zelenka, Kavan Smith (3) as Major Lorne, | Co-Guest Stars: Chuck Campbell (1) as Technician
Director: William Waring
Story: Joseph Mallozzi, Brad Wright (1), Paul Mullie | Teleplay: Paul Mullie, Joseph Mallozzi
 
71 :04x11 - Be All My Sins Remember'd (2) (Jan/04/2008)

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Now that they have a Replicator tracking unit to detect the enemy ships, the Atlantis team must destroy them once and for all. However, to do so they have to ally with the Wraith... who have their own plans.
Guest Stars: Michael Beach as Col. Abe Ellis, Mitch Pileggi as Col. Steven Caldwell, David Nykl as Dr. Radek Zelenka, Christopher Heyerdahl as Wraith Leader, Brendan Penny as Wraith Leader, Michelle Morgan (1) as F.R.A.N., Martin Christopher as Major Marks, Jill Wagner as Larrin, | Co-Guest Stars: Niall Matter as Lt. Kemp, Chuck Campbell (1) as Technician
Director: Andy Mikita
Writer: Martin Gero
 
72 :04x12 - Spoils of War (Jan/11/2008)

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In the aftermath of the Replicator Homeworld destruction, the team discovers an abandoned Hive Ship and investigate. Aboard they find information that leads them to an outpost where the Wraith plan to reactivate the system that allowed them to defeat the Ancients.
Guest Stars: Christopher Heyerdahl as Wraith Leader / "Todd", David Nykl as Dr. Radek Zelenka, Kavan Smith (3) as Major Lorne, Scott Heindl as Male Wraith, Brendan Penny as Wraith Leader / "Todd", | Co-Guest Stars: Morris Chapdelaine as Birthing Wraith, Andee Frizzell as Wraith Queen
Director: William Waring
Writer: Alan McCullough
 
73 :04x13 - Quarantine (Jan/18/2008)

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An alarm starts a quarantine lockdown, causing members of the Atlantis team to be trapped in various areas of the city, including Rodney being stuck in the botany lab with Katie Brown.
Guest Stars: Jewel Staite as Dr. Jennifer Keller, David Nykl as Dr. Radek Zelenka, Brenda James as Dr. Katie Brown, Kavan Smith (3) as Major Lorne, | Co-Guest Stars: Chuck Campbell (1) as Technician
Director: Martin Wood
Writer: Carl Binder (1)
 
74 :04x14 - Harmony (Jan/25/2008)

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Sheppard and McKay escort a young princess on a rite of passage and come upon the queen-to-be's enemies.
Guest Stars: Jodelle Micah Ferland as Harmony, Alexis Kellum Creer as Flora, Crystal Lowe as Mardola, David Richmond-Peck as Genii Field Captain, | Co-Guest Stars: Patrick Gilmore as Genii Soldier, Richard Stroh as Genii Soldier, Adam Lolacher as Genii Man, Jerry Penacoli as Genii Warrior
Director: William Waring
Writer: Martin Gero
 
75 :04x15 - Outcast (Feb/01/2008)
Upon learning his father has passed away, Col. Sheppard returns to Earth to attend the funeral. However, Col. Sheppard, along with Ronon who returned along with him, get sidetracked by news that an offshoot group of the Henry Wallace Corp. has created a replicator on Earth, and that the replicator has escaped from the lab.
Guest Stars: Kari Wuhrer as Nancy, Emma Lahana as Ava Dixon, Stephen E. Miller (1) as Dr. Richard Poole, Dylan Neal as Dave Sheppard, Bill Dow as Dr. Bill Lee, | Co-Guest Stars: Dean Marshall as Sgt. Bates, Adrian Hein as Replicator, Kwesi Ameyaw as Tactical Officer, Ayesha Shiva as Woman
Director: Andy Mikita
Writer: Alan McCullough
Story: Joe Flanigan
 
76 :04x16 - Trio (Feb/08/2008)

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Rodney, Sam, and Dr. Keller end up trapped in an underground chamber with no means of escape and no one knowing where they are.
Guest Stars: Jewel Staite as Dr. Jennifer Keller, | Co-Guest Stars: Isaah Brown as Caminous, Aidan Drummond as Renord, Nico Ghisi as Kid, Alberto Ghisi as Kid
Director: Martin Wood
Writer: Martin Gero
 
77 :04x17 - Midway (Feb/15/2008)

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When Ronon undergoes a briefing by the IOA, Sam has Teal'c come in to help him. Meanwhile, the Wraith discover the Midway Station.
Guest Stars: Christopher Judge as Teal'c, Rob LaBelle as Mr. Coolidge, Bill Dow as Dr. Bill Lee, Scott Heindl as Wraith Leader, Ben Cotton as Dr. Kavanagh, Brendan Penny as Wraith Technician, Gary Jones (1) as Sgt. Walter Harriman, | Co-Guest Stars: Toren Atkinson as Dempster, Chuck Campbell (1) as Technician, Nickolas Baric as Hester, James Chutter as Wraith Scientist
Director: Andy Mikita
Writer: Carl Binder (1)
 
78 :04x18 - The Kindred (1) (Feb/22/2008)

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A deadly disease spreads throughout the Pegasus Galaxy, while Teyla tries to locate her son's father as she travels with Sheppard whose mission uncovers an unexpected find.
Guest Stars: Connor Trinneer as Michael Kenmore / Wraith, Christopher Heyerdahl as Wraith Leader / "Todd", Jewel Staite as Dr. Jennifer Keller, Kavan Smith (3) as Major Lorne, Mitch Pileggi as Col. Steven Caldwell, Paul McGillion as Dr. Carson Beckett, | Co-Guest Stars: Patrick Sabongui as Kanaan, Artine Brown as Trader, David Beairsto as Merchant, B. J. Harrison as Female Merchant, John Sampson as Human guard, Igor Hudacek, Jr. as Scavenger
Director: Peter F. Woeste
Writer: Joseph Mallozzi, Paul Mullie
 
79 :04x19 - The Kindred (2) (Feb/29/2008)

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Teyla manages to find some of her missing Athosians... captured by Michael. Also, the Atlantis crew is surprised when Beckett returns.
Guest Stars: Connor Trinneer as Michael Kenmore / Wraith, Jewel Staite as Dr. Jennifer Keller, Christopher Heyerdahl as Halling, Paul McGillion as Dr. Carson Beckett, | Co-Guest Stars: Patrick Sabongui as Kanaan, Johann Helf as Nabel, Linda Ko as Nurse, Mylene Robic as Anika (as Mylene Dinh-Robic), Ken Kirzinger as Bartender, Mark Curtin as Guard
Director: Martin Wood
Writer: Alan McCullough
 
80 :04x20 - The Last Man (1) (Mar/07/2008)

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Sheppard returns from a mission to find Atlantis abandoned and high and dry on a sand dune thousands of years after his last search for Teyla, but all maybe set right after seeing a hologram of an aged Dr. McKay.
Guest Stars: Jewel Staite as Dr. Jennifer Keller, Christopher Heyerdahl as Wraith Leader / "Todd", Connor Trinneer as Michael Kenmore / Wraith, Kavan Smith (3) as Major Lorne, Kate Hewlett as Jeannie McKay Miller, David Nykl as Dr. Radek Zelenka, Robert Picardo as Richard Woolsey, | Co-Guest Stars: Andee Frizzell as Wraith Queen, Chuck Campbell (1) as Technician, Heather Doerksen as Lieutenant, Kory Grim as Recruit, Christian Sloan as Hybrid, Dan Kashagama as Doctor
Director: Martin Wood
Writer: Joseph Mallozzi, Paul Mullie
 
Season 5
81 :05x01 - Search and Rescue (2) (Jul/11/2008)

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In the aftermath of the self-destruct of Michael's compound, Sam leads a team to rescue the survivors. Sheppard, Ronon and McKay must then rescue Teyla from Michael's cruiser as she goes into labor.
Special Guest Stars: Amanda Tapping as Colonel Samantha Carter, | Guest Stars: Connor Trinneer as Michael Kenmore / Wraith, Mitch Pileggi as Col. Steven Caldwell, Kavan Smith (3) as Major Lorne, Martin Christopher as Major Marks, | Co-Guest Stars: Patrick Sabongui as Kanaan, Leela Savasta as Vega, Jeremy Jones (1) as Edison, Sharon Taylor as Banks, Rainbow Sun Francks as Lt. Aiden Ford, Annalise Macculloch as Torren
Director: Andy Mikita
Writer: Martin Gero
 
82 :05x02 - The Seed (Jul/18/2008)

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The Atlantis team is under a quarantine after Dr. Keller is incapacitated by an alien organism, and a recently revived Dr. Beckett is put in charge of the investigation.
Guest Stars: David Nykl as Dr. Radek Zelenka, Paul McGillion as Dr. Carson Beckett, | Co-Guest Stars: Linda Ko as Nurse, Sharon Taylor as Banks, Annalise Macculloch as Torren
Director: William Waring
Writer: Joseph Mallozzi, Paul Mullie
 
83 :05x03 - Broken Ties (Jul/25/2008)

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Tyre, Ronon's former Satedan comrade, captures Ronon and turns him over to the Wraith. As the Wraith drain Ronon in an attempt to turn him into a Wraith worshiper, the Atlantis team struggle to find their comrade. Meanwhile Teyla reconsiders her role on the team after the birth of her child.
Guest Stars: Kavan Smith (3) as Major Lorne, Sean Campbell (1) as Solen Sincha, Mark Dacascos as Tyre, | Co-Guest Stars: Tyler McClendon as Wraith, Patrick Sabongui as Kanaan, Annalise Macculloch as Torren
Director: Ken Girotti
Writer: Joseph Mallozzi, Paul Mullie
 
84 :05x04 - The Daedalus Variations (Aug/01/2008)

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The team is sent through a series of deadly alternate realities caused by a drive malfunction aboard a mysterious duplicate Daedalus, in which they encounter sinister alien lifeforms, a searing sun, and a space battle for Atlantis.
Guest Stars: Kavan Smith (3) as Major Lorne, David Nykl as Dr. Radek Zelenka, | Co-Guest Stars: Chuck Campbell (1) as Chuck, Tracy Waterhouse as Commander Sobel, Annalise Macculloch as Torren
Director: Andy Mikita
Writer: Alan McCullough
 
85 :05x05 - Ghost in the Machine (Aug/15/2008)

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When Sheppard's team returns from a mission, a strange electrical surge spreads from their Jumper to Atlantis' systems. It spreads, and the team soon discovers that an old teammate is responsible.
Guest Stars: David Nykl as Dr. Radek Zelenka, Michelle Morgan (1) as F.R.A.N., Robert Moloney as Koracen, | Co-Guest Stars: Leanne Adachi as Lia, Chuck Campbell (1) as Chuck, Richard Busch as Marine
Director: Ken Girotti
Writer: Carl Binder (1)
 
86 :05x06 - The Shrine (Aug/22/2008)

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McKay starts to suffer from the onset of senility to an Alzheimer's-like disease.
Guest Stars: Kate Hewlett as Jeannie McKay Miller, David Nykl as Dr. Radek Zelenka, | Co-Guest Stars: Sharon Taylor as Amelia Banks
Director: Andy Mikita
Writer: Brad Wright (1)
 
87 :05x07 - Whispers (Sep/05/2008)

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While investigating one of Michael's facilities, a hybrid creature attacks Sheppard and Beckett.
Guest Stars: Nicole de Boer as Dr. Alison Porter (as Nicole deBoer), Janina Gavankar as Sgt. Mehra, Christina Cox (1) as Major Anne Teldy, Paul McGillion as Dr. Carson Beckett, | Co-Guest Stars: Darren Dolynski as Mirellus, Leela Savasta as Vega, Yurij Kis as Local, Blaine Anderson as Local
Director: William Waring
Writer: Paul Mullie, Joseph Mallozzi
 
89 :05x08 - The Queen (Sep/12/2008)

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The Atlantis team is forced to ally with their Wraith contact again when he negotiates an alliance with another Hive.
Guest Stars: Christopher Heyerdahl as Wraith Leader / "Todd", Apollonia Vanova as Wraith Queen, | Co-Guest Stars: Richard Zeman as Commander Wraith, Tyler McClendon as Kenny Wraith, James Chutter as Bridge Officer Wraith, Sharon Taylor as Banks
Director: Brenton Spencer (2)
Story: Alan McCullough, Alex Levine | Teleplay: Alan McCullough
 
88 :05x09 - Tracker (Sep/19/2008)

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Ronon and McKay have to find a kidnapped Keller, who is abducted to help a village threatened by the Wraith. However, they soon discover that the kidnapper is a Runner.
Guest Stars: Mike Dopud as Kiryk, | Co-Guest Stars: Neela Todd as Celise, Chelah Horsdal as Erran, Domonique Danielle as Burly Woman
Director: William Waring
Story: David Schmidt, Carl Binder (1) | Teleplay: Carl Binder (1)
 
90 :05x10 - First Contact (1) (Sep/26/2008)

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Daniel Jackson arrives on Atlantis on a research mission to locate Janus' laboratory. However, its discovery triggers off an alien invasion and the possible destruction of the Wraith.
Special Guest Stars: Michael Shanks as Dr. Daniel Jackson, | Guest Stars: David Nykl as Dr. Radek Zelenka, Christopher Heyerdahl as Wraith Leader / "Todd", Mitch Pileggi as Col. Steven Caldwell, Martin Christopher as Major Marks, | Co-Guest Stars: Sharon Taylor as Amelia Banks, Chuck Campbell (1) as Chuck, James Chutter as Billy Wraith, Tyler McClendon as Kenny Wraith
Director: Andy Mikita
Writer: Martin Gero
 
91 :05x11 - The Lost Tribe (2) (Oct/10/2008)

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When Daniel Jackson and McKay are trapped in an Ancients lab, Sheppard and the others must get there before Todd the Wraith does.
Special Guest Stars: Michael Shanks as Dr. Daniel Jackson, | Guest Stars: David Nykl as Dr. Radek Zelenka, Christopher Heyerdahl as Wraith Leader / "Todd", Daniella Alonso as Katana, Martin Christopher as Major Marks, | Co-Guest Stars: Tyler McClendon as Kenny Wraith, Sharon Taylor as Amelia Banks, Claire Robertson as Mila, Linda Ko as Marie, James Chutter as Male Wrath
Director: Andy Mikita
Writer: Martin Gero
 
92 :05x12 - Outsiders (Oct/17/2008)

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Sheppard and his team try to evacuate a group of Michael's test subjects before the Wraith find and destroy them.
Guest Stars: Joel Polis as Elson, Sean Tyson as Jervis, Agam Darshi as Novo, Sarah Deakins as Renni, Paul McGillion as Dr. Carson Beckett, | Co-Guest Stars: G. Michael Gray (1) as Safaris, Aaron Craven as Commander Wraith, Tyler McClendon as Second in Command Wraith, James Chutter as Bridge Tech Wraith, Brendan Penny as Male Wraith
Director: William Waring
Writer: Alan McCullough
 
93 :05x13 - Inquisition (Oct/24/2008)

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Sheppard's team is captured by a new coalition of Pegasus Galaxy civilizations, and must defend Atlantis against accusations that they have killed millions due to their arrogance.
Guest Stars: Kavan Smith (3) as Major Lorne, Alan Blumenfeld as Dimas, | Co-Guest Stars: David Lovgren as Kelore, Tobias Slezak as Myrus, Kaaren deZilva as Shiana
Director: Brenton Spencer (2)
Writer: Alex Levine
 
94 :05x14 - Prodigal (Nov/07/2008)

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Michael returns and is intent on recovering Teyla's baby to further his experimentation... and will go to any lengths to obtain him.
Guest Stars: Connor Trinneer as Michael Kenmore / Wraith, David Nykl as Dr. Radek Zelenka, Kavan Smith (3) as Major Lorne, | Co-Guest Stars: Sharon Taylor as Amelia Banks, Brad Dryborough as Lead Hybrid, Brandon Blue as Hybrid, Colin Corrigan as Team Member
Director: Andy Mikita
Writer: Carl Binder (1)
 
95 :05x15 - Remnants (Nov/14/2008)

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While exploring the mainland, John encounters an old enemy out for revenge. Meanwhile, the IOA sends someone to review Woolsey's performance, and Rodney and Zelenka discover an alien device on the ocean bottom.
Guest Stars: Robert Davi (1) as Ex-Commander Acastus Kolya, Tamlyn Tomita as Chinese Ambassador Shen Xiaoyi, David Nykl as Dr. Radek Zelenka, Anna Galvin as Dr. Vanessa Conrad, | Co-Guest Stars: Sharon Taylor as Amelia Banks, Haley Cook as Dr. Kiang, Jonathon Young (1) as Parrish, Chuck Campbell (1) as Chuck, Carlo Fanella as Genii Soldier, Linden Banks as Dovelock
Director: William Waring
Writer: Paul Mullie, Joseph Mallozzi
 
96 :05x16 - Brain Storm (Nov/21/2008)

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Rodney reluctantly returns to Earth with Keller to watch the unveiling of his rival's new weather device, but when it goes awry, he's the only one who can stop it.
Guest Stars: Dave Foley as Dr. Malcolm Tunney, Marshall Bell as Terrence Kramer, Bill Nye (1) as Himself, Neil Tyson as Himself (as Neil deGrasse Tyson), Gary Jones (1) as Sgt. Walter Harriman, | Co-Guest Stars: Michael Coleman (1) as Front Desk Guy, Naomi Dayneswood as Assistant, Shirley Ng as Scientist
Director: Martin Gero
Writer: Martin Gero
 
97 :05x17 - Infection (Dec/05/2008)

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After a Wraith hive ship shows up over Atlantis transmitting a distress call, a team investigates and finds that its crew have been stricken with a familiar disease.
Guest Stars: Christopher Heyerdahl as Wraith Leader / "Todd", Kavan Smith (3) as Major Lorne, | Co-Guest Stars: Sharon Taylor as Amelia Banks, Christopher Pearce (1) as Marine Williams
Director: Andy Mikita
Writer: Alan McCullough
 
98 :05x18 - Identity (Dec/12/2008)

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An alien thief, Neeva Casol, inadvertently uses an Ancient device to switch minds with Dr. Keller from a distance. While she deals with the team on Atlantis, Keller must handle Neeva's uninformed accomplices.
Guest Stars: Dawn Olivieri as Neeva Casol, David Nykl as Dr. Radek Zelenka, Paul McGillion as Dr. Carson Beckett, | Co-Guest Stars: Ronald Selmour as Jannick, Todd Thompson as Bordal, Jonathan Holmes (1) as Magistrate, Karin Konoval as Second in Command, Linda Ko as Nurse, Paul Herbert as Technician, Rick Wong as Dr. McBride
Director: William Waring
Writer: Carl Binder (1)
 
99 :05x19 - Vegas (Jan/02/2009)

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Detective John Sheppard works a serial killer's case in Las Vegas, but a stranger informs him reality isn't all that it seems.
Guest Stars: Neil Jackson as Wraith, David Nykl as Dr. Radek Zelenka, Christopher Heyerdahl as Wraith Leader / "Todd", Gary Jones (1) as Sgt. Walter Harriman, Frank Vincent (1) as Poker Player, Steve Schirripa as Poker Player, | Co-Guest Stars: Jody Thompson as Nurse, Mark Burgess (1) as Sick Guy, Chris Nowland as Crime Scene Guy, David Paul Grove (1) as Hotel Manager (as David-Paul Grove), Paul Jarrett as Captain Hendricks, Carmen Moore as Reporter, Loren Christopher Michaels as Dealer, Joel Goldsmith as Poker Player, Charles Cohen as Poker Player, Roy Winston as Poker Player, Todd Brunson as Poker Player
Director: Robert C. Cooper (3)
Writer: Robert C. Cooper (3)
Songs: Johnny Cash -- Solitary Man, The Rolling Stones -- Sympathy for the Devil, Marilyn Manson -- The Beautiful People
 
100 :05x20 - Enemy at the Gate (Jan/09/2009)

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Todd brings Atlantis news that one of his underlings has obtained a ZPM, and plans to use it to build a new Hive supership... and attack Earth.
Special Guest Stars: Amanda Tapping as Colonel Samantha Carter, | Guest Stars: Christopher Heyerdahl as Wraith Leader / "Todd", Mitch Pileggi as Col. Steven Caldwell, David Nykl as Dr. Radek Zelenka, Kavan Smith (3) as Major Lorne, Martin Christopher as Major Marks, Michael Beach as Col. Abe Ellis, Gary Jones (1) as Sgt. Walter Harriman, Paul McGillion as Dr. Carson Beckett, | Co-Guest Stars: Colin Cunningham (1) as Davis, Sharon Taylor as Amelia Banks, Ben Cotton as Kavanaugh, Tyler McClendon as Wraith, Chuck Campbell (1) as Chuck
Director: Andy Mikita
Writer: Paul Mullie, Joseph Mallozzi
 
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