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)