
Robert Knepper - Theodore "T-Bag" Bagwell (19/22 episodes).Paul Adelstein - Paul Kellerman (19/22 episodes).
Sarah Wayne Callies - Sara Tancredi (22/22 episodes). Wade Williams - Brad Bellick (22/22 episodes). Peter Stormare* - John Abruzzi (17/22 episodes). Marshall Allman - Lincoln "LJ" Burrows Jr (11/22 episodes). Amaury Nolasco - Fernando Sucre (22/22 episodes). Robin Tunney - Veronica Donovan (22/22 episodes). Wentworth Miller - Michael Scofield (22/22 episodes).
Dominic Purcell - Lincoln Burrows (22/22 episodes). Paul Adelstein and Robert Knepper were credited as guest stars before episode 3 Peter Stormare was credited as a guest star after episode 13 and Rockmond Dunbar was credited as a guest star before episode 14.