| Richard Belzer | John Munch |
| Andre Braugher | Frank Pembleton |
| Reed Diamond | Mike Kellerman |
| Michelle Forbes | Dr. Julianna Cox |
| Clark Johnson | Meldrick Lewis |
| Yaphet Kotto | Al Giardello |
| Melissa Leo | Kay Howard |
| Max Perlich | J.H. Brodie |
| Kyle Secor | Tim Bayliss |
| Lee Tergesen | Chris Thormann |
| Edie Falco | Eva Thormann |
| Monica Keena | Billie Rader
(as Monica Kenna) |
| Zeljko Ivanek | ASA Ed Danvers |
| Robert Bornarth | George Bayliss |
| Ray Felton | Rinaldi |
| Larry Hull | Charles Flavin
(as Larry E. Hull) |
| Maureen Kerrigan | Lucille Rader |
| Gary Lee Leventhal | Desk Sergeant |
| Susan Lynskey | Bonnie Tiles
(as Susan M. Lynskey) |
| Paul Meshejian | Reich |
| Jay Spadaro | Officer Salerno |
| Letha V. Walker | Lillian |
| Michael Anthony Williams | Sayles
(as Michael Williams) |
| Sean Kent | Neil Passey
(uncredited) |