Robert Collins Director David Birney Officer Frank Serpico Actor Allen Garfield The Professor Actor Burt Young Alec Rosen Actor Tom Atkins Lt. Tom Sullivan Actor Janette Lane Bradbury Carol Actor Christine Jones Kim Actor Will Kuluva Mr. Serpico Actor Walter McGinn David Doyle Actor Mario Roccuzzo David Doyle Actor Sydney Lassick Goldman Actor Anthony Charnota Joe Simone Actor Carl Lee Carothers Actor Richard C. Adams Atkins Actor Madison Arnold Polo Actor Albert Henderson Sgt. Morgan Actor Antony Ponzini Dominique Actor Harry Shearer Hippy Actor Emmet G. Lavery Jr. Producer