Warren Beatty
Joseph Frady
William Daniels
Austin Tucker
Walter McGinn
Jack Younger
Kelly Thordsen
Sheriff L.D. Wicker
Chuck Waters
Thomas Richard Linder
William Joyce
Senator Charles Carroll
Betty Murray
Mrs. Charles Carroll
Bill McKinney
Parallax Assassin
Jo Ann Harris
Chrissy - Frady's Girl
Ted Gehring
Schecter - Hotel Clerk
Lee Pulford
Shirley - Brunet Salmontail Bar Girl
Doria Cook-Nelson
Gale - Blond Salmontail Bar Girl
Kenneth Mars
Former FBI Agent Will
William Jordan
Tucker's Aide
Edward Winter
Senator Jameson
Stacy Keach, Sr.
Commission Spokesman #1
Ford Rainey
Commission Spokesman #2
Richard Bull
Parallax Goon
Joe Di Reda
Ralph Scoletta
Robert P. Lieb
Senator Gillingham
John S. Ragin
Buster Himan
Anthony Zerbe
Prof. Nelson Schwartzkopf (uncredited)