| • Robert Blanche | played | Franco | 25 Episodes |
| • Damien Puckler | played | Meisner | 25 Episodes |
| • Danny Bruno | played | Bud / Bud Wurstner | 23 Episodes |
| • Jacqueline Toboni | played | Trubel | 23 Episodes |
| • Alexis Denisof | played | Prince Viktor | 18 Episodes |
| • Christian Lagadec | played | Man / Castle Spy / Renard's Spy / Sebastien | 17 Episodes |
| • Philip Anthony-Rodriguez | played | Ruspoli | 13 Episodes |
| • Sharon Sachs | played | Dr. Harper | 11 Episodes |
| • Claire Coffee | played | Adalind Schade | 10 Episodes |
| • Anne Leighton | played | Rachel Wood | 8 Episodes |
| • James Frain | played | Eric Renard | 7 Episodes |
| • Shohreh Aghdashloo | played | Stefania Vaduva Popescu | 7 Episodes |
| • Mary McDonald-Lewis | played | Frau Pech | 6 Episodes |
| • Louise Lombard | played | Elizabeth Lascelles | 6 Episodes |
| • Michael Sheets | played | Peter / Andrew Dixon | 6 Episodes |
| • Nico Evers-Swindell | played | Kenneth | 6 Episodes |
| • John Srednicki | played | Paramedic / Deputy Medical Examiner / EMT #1 | 5 Episodes |
| • Bree Turner | played | Rosalee Calvert | 5 Episodes |
| • Garcelle Beauvais | played | Henrietta | 5 Episodes |
| • Elizabeth Rodriguez | played | Agent Chavez | 5 Episodes |
| • Mary Elizabeth Mastrantonio | played | Woman in Black / Kelly Burkhardt | 5 Episodes |
| • Spencer Conway | played | Alexander | 5 Episodes |
| • Kyle Vahan | played | John Oblinger | 5 Episodes |
| • Jim Crino | played | Leroy Estes | 5 Episodes |
| • Cazzey Cereghino | played | Big Guy / Bar Fight Guy / Big Harold Johnson / Harold "Big" Johnson | 5 Episodes |
| • Jon Bebe | played | Officer Mays | 5 Episodes |
| • Adam Dunlap | played | Masked Man #2 / Walter Dempsey | 5 Episodes |
| • M. Ben Newman | played | Jeremiah Rogers | 5 Episodes |
| • Bertila Damas | played | Pilar | 4 Episodes |
| • Joseph Bertot | played | Detective Pogue | 4 Episodes |
| • C. Thomas Howell | played | Weston Steward | 4 Episodes |
| • David Ury | played | Hofmann | 4 Episodes |
| • Brenda Braxton | played | TV Reporter #5 / News Anchor / Reporter #1 / Newscaster | 4 Episodes |
| • Hank Cartwright | played | Jerry / Jerry Baxter | 4 Episodes |
| • Kendall Wells | played | Kyle / Woods Verrat #1 / Verrat #1 / Agent Four | 4 Episodes |
| • Lucas Near-Verbrugghe | played | Josh Porter | 4 Episodes |
| • Jean-Luc Boucherot | played | Yanko / Face in Wall #4 | 4 Episodes |
| • Nurmi Husa | played | De Groot | 4 Episodes |
| • Kenajuan Bentley | played | Sam Damerov | 4 Episodes |
| • Daniel Roebuck | played | Lt. Orson / Peter Orson | 3 Episodes |
| • Dee Wallace Stone | played | Alice | 3 Episodes |
| • Matt Nolan | played | Detective Meacham | 3 Episodes |
| • Chris Mulkey | played | Bart | 3 Episodes |
| • Bailey Chase | played | Lucien Petrovitch | 3 Episodes |
| • Will Rothhaar | played | Officer Acker / Officer Jesse Acker | 3 Episodes |
| • Ted Rooney | played | Joihn Addison / Purifier | 3 Episodes |
| • Brandon Quinn | voiced | Creepy Voice / Charlie Riken | 3 Episodes |
| • Reg E. Cathey | played | The Baron | 3 Episodes |
| • Jessica Tuck | played | Catherine Schade | 3 Episodes |
| • Sharon Leal | played | Zuri Ellis | 3 Episodes |
| • Michael Grant Terry | played | Ryan Smulson | 3 Episodes |
| • Jennifer Lanier | played | Lab Tech / Female Jailer | 3 Episodes |
| • Gene Freedman | played | Danilov / Gregor Danilov | 3 Episodes |
| • Robin Langford | played | Frenay | 3 Episodes |
| • Dan Kremer | played | King Frederick | 3 Episodes |
| • Joshua Sawtell | played | Marwan Hanaro | 3 Episodes |
| • Cobey Mandarino | played | Special Agent Rosten | 3 Episodes |
| • Michael Agostini | played | Carter / Bodyguard #2 | 3 Episodes |
| • Glen Baggerly | played | Lead Officer / SERT Team Leader / SERT #1 | 3 Episodes |
| • Sophie Soong | played | Reporter #3 / Reporter | 3 Episodes |
| • Tabor Helton | played | Businessman / Theo | 3 Episodes |
| • Casey Vann | played | Angry Perp / Cecil | 3 Episodes |
| • Tim Becker | played | Reporter / Reporter #2 | 3 Episodes |
| • Tony Calvino | played | Officer | 3 Episodes |
| • Simone Leorin | played | Hundjager Two / Italian Council Member | 3 Episodes |
| • Kevin Carroll (1) | played | Arnold Rosarot | 3 Episodes |
| • Jeb Berrier | played | Al Eckert / Prosecutor | 3 Episodes |
| • Kamyar Jahan | played | Miguel | 3 Episodes |
| • Darcy Miller | played | Wife / Phyllis | 3 Episodes |
| • Michael Fisher-Welsh | played | Thoracic Surgeon / Doctor | 3 Episodes |
| • Donald Macellis | played | Shaw / Shaw Steinkelllner | 3 Episodes |
| • Sam Anderson | played | Rolek Porter | 2 Episodes |
| • Henri Lubatti | played | Reaper | 2 Episodes |
| • Robert Clendenin | played | Xavier Arivaca | 2 Episodes |
| • Mike Dopud | played | Mauvais Dentes | 2 Episodes |
| • George Castillo | played | Doctor Graham / Announcer | 2 Episodes |
| • Wolf Muser | played | Father Eickholt | 2 Episodes |
| • Karen Tucker | played | Receptonist / Landlady | 2 Episodes |
| • Toni Trucks | played | Deputy Sheriff Janelle Farris | 2 Episodes |
| • Kate Burton | played | Marie Kessler | 2 Episodes |
| • Brian Tee | played | Akira Kimura | 2 Episodes |
| • Jaime Ray Newman | played | Angelina Lasser | 2 Episodes |
| • Brian Steele | played | Volcanalis / Golem | 2 Episodes |
| • Lisa Vidal | played | DA Lauren Castro | 2 Episodes |
| • Brian Letscher | played | Timothy Croft Perkal / Octo-Man | 2 Episodes |
| • Greg Michaels | played | Sheriff Doug Parcell | 2 Episodes |
| • Michele Mariana | played | Rosa Florez / Woman | 2 Episodes |
| • Alicia Lagano | played | Alicia | 2 Episodes |
| • Igor Korosec | played | Gottlob | 2 Episodes |
| • Nick Krause | played | Jonah Riken | 2 Episodes |
| • Cooper Taylor | played | Woods Verrat #2 / Verrat #2 | 2 Episodes |
| • Gabriel Salvador | played | Dallas Cruz | 2 Episodes |
| • Susannah Mars | played | Dr. Richet | 2 Episodes |
| • Michelle N. Carter | played | Special Agent Brady | 2 Episodes |
| • Erin McGarry | played | Female Officer / Officer Ricci | 2 Episodes |
| • Ayanna Berkshire | played | Dr. Rose | 2 Episodes |
| • Laura Faye Smith | played | Deetta | 2 Episodes |
| • Matt Lasky | played | Woden | 2 Episodes |
| • Tim True | played | Leroy Kent / Larry | 2 Episodes |
| • Ricki Bhullar | played | David Gimlin / Dix Turner | 2 Episodes |
| • Drew Barrios | played | Delmar Blake / Charlie Mane | 2 Episodes |
| • Tracy Gaillard | played | Monique | 2 Episodes |
| • Don Alder | played | Fred Eberhart / Nate Harrow | 2 Episodes |
| • Timothy Whitcomb | played | Al the Tow Truck Driver | 2 Episodes |
| • Billy Louviere | played | Dolph | 2 Episodes |
| • Randy Schulman | played | Freddy / Freddy Calvert | 2 Episodes |
| • Gary Cash | played | Breslau | 2 Episodes |
| • Lanie Hoyo | played | CSI | 2 Episodes |
| • Rodney Sherwood | played | Henry Slocombe | 2 Episodes |
| • Tierra Valentine | played | Sylvie's Roommate / Jenny Lee | 2 Episodes |
| • Kacey Griffin | played | Policewoman / Officer Messina | 2 Episodes |
| • Josh Mead | played | Young Man / Zack Blumenthal | 2 Episodes |
| • Cecily Crow | played | Female Paramedic / Carol | 2 Episodes |
| • Shelley B. Shelley | played | Grace Kaplan / Cynthia Reynolds | 2 Episodes |
| • Jack Sneed | played | Officer / Cop | 2 Episodes |
| • Dana Millican | played | Nurse / M.E. Bindra | 2 Episodes |
| • Aristophane Juson | played | EMT / Paramedic 1 | 2 Episodes |
| • Michelle Damis | played | Cindy / Suited Woman | 2 Episodes |
| • Cherif Khazem | played | Frenchman | 2 Episodes |
| • Steve Alderfer | played | Husband | 2 Episodes |
| • Pat Janowski | played | Harriet | 2 Episodes |
| • Lisa Carswell | played | Nora Grosszahn | 2 Episodes |
| • Jerry Bell | played | Harbor Cop #2 / Bar Guy | 2 Episodes |
| • Patrick Oury | played | Cousin #2 / Coyote Prisoner | 2 Episodes |
| • Robert Alan Barnett | played | Matthew | 2 Episodes |
| • Rick Walters | played | SWAT Team Leader / SERT #2 | 2 Episodes |
| • Bradley Goodwill | played | Grant Hoschen / George Ksataros | 2 Episodes |
| • Martyn G. Krouse | played | Hundjager One | 2 Episodes |
| • Carolyn Marie Monroe | played | Hundjager Three | 2 Episodes |
| • Trenton Rostedt | played | Hundjager Four | 2 Episodes |
| • Bryar Freed-Golden | played | Gloria | 2 Episodes |
| • Bernhard Forcher | played | Tavitian | 2 Episodes |
| • William Warren Ward | played | Homeless Man | 2 Episodes |
| • Jenny McShane | played | Lilly O'Hara | 2 Episodes |
| • Luke King | played | Lucas / Bodyguard #1 | 2 Episodes |
| • Madeline Brewer | played | Billlie Trump | 2 Episodes |
| • Cameron Kolkemo | played | Older Girl | 2 Episodes |
| • Delaney Hagfeldt | played | Younger Girl | 2 Episodes |
| • Tyler Miles | played | Scott Himber / Robert "Robbie" Kyle | 2 Episodes |
| • Tom Walton | played | Joe | 2 Episodes |
| • Kevin Newland Scott | played | Night Manager / Landlord | 2 Episodes |
| • Josh Rice | voiced | Building Guard | 2 Episodes |
| • Kirsten Foe | played | Wedding Guest / Wendy Henley | 2 Episodes |
| • Andrew Stearns | played | Kent Vickers | 2 Episodes |
| • Clancy Bundy | played | Masked Man #1 | 2 Episodes |
| • Tommy Daniels | played | Man #1 / Victim #3 | 2 Episodes |
| • Barbara Deering | played | Woman | 2 Episodes |
| • Sloane McGinnis | played | Diana | 2 Episodes |
| • Brian Dykeman | played | Man in Black 4 | 2 Episodes |
| • Scott Thomas (1) | played | Guard / HW Soldier | 2 Episodes |
| • Jamie Pederson | played | Ludwig | 2 Episodes |
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