Officer Frank Serpico
Sidney Green
Tom Keough
Captain McClain
Laurie
Leslie Lane
Bob Blair
Pasquale
D. A. Tauber
Rubello
Lombardo
Peluce
Malone
Joey
Potts
Captain Tolkin
Waterman
Larry
Steiger
Barto
Palmer
Mr. Serpico
Mrs. Serpico
Smith
Dr. Metz
Corsaro
Brown
Berman
Kellogg
Sarno
Gilbert
Gallagher
Daley
Delaney
Detective Partner (uncredited)
Man (uncredited)
Detective Threatening Serpico (uncredited)
Weapons Storage Officer (uncredited)
Police Lieutenant (uncredited)
Det. Styles (uncredited)
Cop (uncredited)
Rape Victim (uncredited)
Cervantes Teacher (uncredited)
Cop - Narcotics Raid (uncredited)
Police Academy Classmate (uncredited)
Television Cameraman (uncredited)
Detective (uncredited)
Det. Glover (uncredited)
Charlie (uncredited)
Desk Sergeant (uncredited)
Black Hood (uncredited)
Black Prisoner (uncredited)
Bookmaker (uncredited)
Detective Sitting At Desk (uncredited)
Street Urchin (uncredited)
Sally - Girl at Party (uncredited)
Doctor