Anthony Franciosa
— Charles (as Tony Franciosa)
Anjanette Comer
— Denise
Guy Stockwell
— Braden
Paul Hubschmid
— Frederich
Tom Bell
— Ian
Michael Constantine
— Ladislov
Harry Townes
— General Marchois
John Marley
— Rausch
Milton Selzer
— Bartowski
Patric Knowles
— General Lloyd-Griffis
Tige Andrews
— Nicolay
Émile Genest
— General Grieux (as Emile Genest)
Lee Bergere
— Miral
Virginia Christine
— Frau Gulden
Harry Landers
— Pilot
Jean-Michel Michenaud
— Polish Boy (as Gerald Michenaud)
Gene Dynarski
— Capek (as Eugene Dynarski)
Ivor Barry
— Air Marshal Evelyn
Simon Scott
— General Jomar