Elliott Gould

Robert Caulfield

James Brolin

Col. Charles Brubaker

Brenda Vaccaro

Kay Brubaker

Sam Waterston

Lt. Col. Peter Willis

O. J. Simpson

Cmdr. John Walker

Hal Holbrook

Dr. James Kelloway

Karen Black

Judy Drinkwater

Telly Savalas

Albain

David Huddleston

Hollis Peaker

David Doyle

Walter Loughlin

Lee Bryant

Sharon Willis

Denise Nicholas

Betty Walker

Robert Walden

Elliot Whitter

James B. Sikking

Control Room Man

Alan Fudge

Capsule Communicator

James Karen

Vice President Price

Jon Cedar

F.B.I. Man Number 1

Hank Stohl

General Enders

Norman Bartold

President

Darrell Zwerling

Dr. Bergen

Milton Selzer

Dr. Burroughs

Lou Frizzell

Horace Gruning

Nancy Malone

Mrs. Peaker

Paul Picerni

Jerry

Barbara Bosson

Alva Leacock

Bob Harks

Reporter (uncredited)

Frank Farmer

Policeman

Bob Bryan

Spectator (uncredited)