George Hamilton
— Jeffrey Hill
Joseph Cotten
— Ace
Marie Laforêt
— Olga Vodkine
Maurice Evans
— Nicolai Vodkine
Wolfgang Preiss
— Wilhelm Von Schenk
Karl Lieffen
— Helmut
Alexander Hegarth
— Brügger
Charlie Hickman
— Lieutenant Gilder
Eduard Linkers
— Geisling
Al Hoosmann
— Police Sergeant
Bob Cheslock
— Kauffmann
Carroll Baker
— Carroll Baker
Zsa Zsa Gabor
— Zsa Zsa Gabor
Lilli Palmer
— Lilli Palmer
Arthur Brauss
— Insurance Company Employee (uncredited)
Robert Naegele
— Ticket Agent at Airport (uncredited)
Philip Roye
— New York Police Sergeant (uncredited)
Udo N. von Tyrol
— French Policeman (uncredited)
Monika Zinnenberg
— Ticket Agent at Airport (uncredited)