Albert Dekker as Secretary of Defense

Brian Donlevy as Gen. Terry Arnold

Diane Findlay as Sgt. Susan Embers

John Baragrey as Capt. Lovell

Dick O'Neill as Gen. O'Neill

Eiji Funakoshi as Dr. Hidaka

Michiko Sugata as Nobuyo

Harumi Kiritachi as Kyoke

Mort Marshall as Jules Manning

Bob Carraway as Lt. Simpson

Alan Oppenheimer as Dr. Contrare

John McCurry as A1C Hopkins

Steve Zacharias as Sen. Billings

Walter Arnold as American Ambassador

Thomas Stubblefield as J.T. Standish