| Al Pacino | Officer Frank Serpico |
| John Randolph | Chief Sidney Green |
| Jack Kehoe | Tom Keough |
| Biff McGuire | Capt. Insp. McClain |
| Barbara Eda-Young | Laurie |
| Cornelia Sharpe | Leslie Lane |
| Tony Roberts | Bob Blair |
| John Medici | Pasquale |
| Allan Rich | Dist. Atty. Herman Tauber |
| Norman Ornellas | Don Rubello |
| Director | Sidney Lumet |
| Producer | Martin Bregman; Dino De Laurentiis |
| Writer | Peter Maas; Waldo Salt |
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