Henry Fonda

as The President

Walter Matthau

as Prof. Groeteschele

Fritz Weaver

as Col. Cascio

Larry Hagman

as Buck

Frank Overton

as Gen. Bogan

Edward Binns

as Col. Jack Grady

Dan O'Herlihy

as Brig. Gen. Warren A. Black

William Hansen

as Defense Secretary Swenson

Russell Hardie

as Gen. Stark

Janet Ward

as Helen Grady

Dom DeLuise

as TSgt. Collins

Russell Collins

as Knapp

Sorrell Booke

as Congressman Raskob

Nancy Berg

as Ilsa Wolfe

John Connell

as Thomas

Frank Simpson

as Sullivan

Hildy Parks

as Betty Black

Dana Elcar

as Foster

Louise Larabee

as Mrs. Cascio

Stewart Germain

as Mr. Cascio

Geri Miller

as Go-go Dancer (uncredited)

Charles Tyner

as Jet Fighter Pilot (voice) (uncredited)

Frieda Altman

as Jennie

Will Wright

as Bit Part (uncredited)