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| •David Anders | played | Adam / Takezo Kensei (episode 28-; recurring previously) (7 Eps.) |
| •James Kyson Lee | played | Ando Masahashi (S02-, recurring previously) (36 Eps.) |
| •Cristine Rose | played | Angela Petrelli (S03-; recurring previously) (27 Eps.) |
| •Hayden Panettiere | played | Claire Bennet (66 Eps.) |
| •Leonard Roberts | played | D.L. Hawkins (episodes 5-23; recurring otherwise) (15 Eps.) |
| •Kristen Bell | played | Elle (episode 28-37; recurring afterwards) (9 Eps.) |
| •Masi Oka | played | Hiro Nakamura (61 Eps.) |
| •Santiago Cabrera | played | Isaac Mendez (episodes 1-6, 8-9, 11-12, 14, 16, 18-19, 21) (16 Eps.) |
| •Greg Grunberg | played | Matt Parkman (57 Eps.) |
| •Dania Ramirez | played | Maya Herrera (episodes 24-41; recurring afterwards) (17 Eps.) |
| •Noah Gray-Cabey | played | Micah Sanders (episodes 1-34) (27 Eps.) |
| •Sendhil Ramamurthy | played | Mohinder Suresh (56 Eps.) |
| •Dana Davis | played | Monica Dawson (episodes 27-34) (6 Eps.) |
| •Adrian Pasdar | played | Nathan Petrelli (60 Eps.) |
| •Ali Larter | played | Niki/Jessica Sanders (S01-S02); Tracy Strauss (S03-) (50 Eps.) |
| •Jack Coleman | played | Noah Bennet (episode 11-; recurring previously) (57 Eps.) |
| •Milo Ventimiglia | played | Peter Petrelli (62 Eps.) |
| •Robert Knepper | played | Samuel Sullivan (Episode 67-, recurring previously) (5 Eps.) |
| •Tawny Cypress | played | Simone Deveaux (episodes 1-16, 18, 23) (12 Eps.) |
| •Zachary Quinto | played | Sylar / Gabriel Gray (S02-, recurring previously) (41 Eps.) |