Warren Beatty as Joseph Frady

Paula Prentiss as Lee Carter

William Daniels as Austin Tucker

Walter McGinn as Jack Younger

Hume Cronyn as Bill Rintels

Kelly Thordsen as Sheriff L.D. Wicker

Chuck Waters as Thomas Richard Linder

Earl Hindman as Deputy Red

William Joyce as Senator Charles Carroll

Betty Murray as Mrs. Charles Carroll

Bill McKinney as Parallax Assassin

Jo Ann Harris as Chrissy - Frady's Girl

Ted Gehring as Schecter - Hotel Clerk

Lee Pulford as Shirley - Salmontail Bar Girl

Doria Cook-Nelson as Gale - Blond Salmontail Bar Girl

Jim Davis as George Hammond

Joan Lemmo as Organist

Kenneth Mars as Former FBI Agent Will

William Jordan as Tucker's Aide

Edward Winter as Senator Jameson

Stacy Keach, Sr. as Commission Spokesman #1

Ford Rainey as Commission Spokesman #2

Alma Beltran as Joy Holder

Richard Bull as Parallax Goon

Suzanne Cohane as Stewardess

Ronda Copland as Girl

Joe Di Reda as Ralph Scoletta

Patsy Garrett as Woman

Penelope Gillette as Woman

Robert P. Lieb as Senator Gillingham

William Swan as Herbert Moon

John S. Ragin as Buster Himan

Vernon Weddle as Harry Lutz

Anthony Zerbe as Prof. Nelson Schwartzkopf (uncredited)

Shirley Anthony as Plane Passenger (uncredited)

Craig R. Baxley as C.I.A. Agent - Top of Space Needle (uncredited)

Jack Berle as Plane Passenger (uncredited)

Garrett Cassell as Dopey (uncredited)

Eddie Garrett as Plane Passenger (uncredited)

Dorothy Hack as Plane Passenger (uncredited)

George Hickman as Committee Member (uncredited)

George Hoagland as Hotel Guest (uncredited)

Kathryn Janssen as Woman in Building (uncredited)

Steve Kelley as Class President (uncredited)

John Marlin as Plane Passenger (uncredited)

Michael David McGuire as Assassination Witness (uncredited)

Bill Scully as Committee Member (uncredited)

George Tracy as Bar Patron (uncredited)

Glenn R. Wilder as Parallax Agent (uncredited)

Adolf Hitler as Self (archive footage) (uncredited)

Richard Nixon as Self (archive footage) (uncredited)

Lee Harvey Oswald as Self (archive footage) (uncredited)

John XXIII. as Self (archive footage) (uncredited)