| Sean Whitesell |
Prisoner #97G414 Donald Groves (Episodes 1-8)
|
| Robert Clohessy |
Officer Sean Murphy (Episodes 18-55)
|
| Scott William Winters |
Prisoner #98P204 Cyril O'Reily (Episodes 11, 13-56)
|
| Ernie Hudson |
Warden Leo Glynn (Episodes 1-55)
|
| Rita Moreno |
Sister Peter Marie Reimondo (1997-2003)
|
| J.K. Simmons |
Prisoner #92S110 Vernon Schillinger (1997-2003)
|
| B.D. Wong |
Father Ray Mukada (Episodes 2-46, 49-56)
|
| Lauren Velez |
Dr. Gloria Nathan (1997-2003)
|
| Philip Casnoff |
Nikolai Stanislofsky (Episodes 19 - 31)
|
| Christopher Meloni |
Prisoner #98K514 Chris Keller (Episodes 12 - 25, 27-36, 42-56)
|
| Dean Winters |
Prisoner #97P904 (1997-2003)
|
| Dean Winters |
Prisoner #97P904 Ryan O'Reily (1997-2003)
|
| Luis Guzman |
Prisoner #98H492, El Cid A.K.A. Raoul Hernandez (Episodes 14-27)
|
| Stephen Gevedon |
Prisoner #97R510 Scott Ross (1997, Episodes 5-8)
|
| David Zayas |
Prisoner #005871 Enrique Morales ( Episodes 27-53)
|
| Kathryn Erbe |
Prisoner #97B642 Shirley Bellinger (Episodes 11-28, 50)
|
| Harold Perrineau Jr. |
Prisoner #95H522 Augustus Hill (1997-2003)
|
| Zeljko Ivanek |
Governor James Devlin (Recurring)
|
| Edie Falco |
Officer Diane Whittlesey (Episodes 1-18, 20-24)
|
| Kristin Rohde |
Claire Howell (Episodes 17-39, 41-56)
|
| Lee Tergesen |
Prisoner #97B412 Tobias Beecher (1997-2003)
|
| George Morfogen |
Prisoner #65R814 Bob Rebadow (1997-2003)
|
| Kirk Acevedo |
Prisioner #97A413 Miguel Alvarez (Episodes 1-26, 34-36, 41-56)
|
| J.D. Williams |
Prisoner #97W566 Kenny Wangler A.K.A. Bricks (Episodes 2-25)
|
| Chuck Zito |
Chucky "The Enforcer" Pancamo (Episodes 36-56)
|
| Terry Kinney |
Tim McManus (Episodes 1 - 26, 28-56)
|
| Adewale Akinnuoye-Agbaje |
Prisoner #93A234 Simon Adebisi (Episodes 1-32)
|
| Eamonn Walker |
Prisoner #97S444 Kareem Said (Episodes 1-51)
|
| Granville Adams |
Prisoner #97A622 Zahir Arif A.K.A. Jerome Van Dyke (Recurring In Season 1, Regular 1998-2003 )
|
| Charles Busch |
Natalie "Nat" Ginsburg (1999-2000)
|
| Michael Wright |
Prisoner #01W711 Omar White (Episodes 33-55)
|
| Anthony Chisholm |
Prisoner #01R289 Burr Redding (Episodes 34-56)
|
| muMs |
Prisoner #96J332/98J442 Arnold Jackson A.K.A. Poet (Recurring In Season 1, Regular 1998-2003 )
|
| Sean Dugan |
Timmy Kirk (Episodes 10-16, 27-42)
|
| Evan Seinfeld |
Prisoner #98H432 Jaz Hoyt (Episodes 15-18, 24 - 54, 56)
|
| James Palacio |
Fiona Zonioni
|
| Steven Wishnoff |
Tony Masters Prisoner #98M922 (1997 - 2003,)
|
