George Hamilton as Jeffrey Hill

Joseph Cotten as Ace

Marie Laforêt as Olga Vodkine (as Marie Laforet)

Maurice Evans as Nicolai Vodkine

Wolfgang Preiss as Wilhelm Von Schenk

Karl Lieffen as Helmut

Alexander Hegarth as Brügger

Charlie Hickman as Lieutenant Gilder (as Chaz Hickman)

Eduard Linkers as Geisling

Al Hoosmann as Police Sergeant (as Al Hoosman)

Bob Cheslock as Kauffmann

Carroll Baker as Carroll Baker

Zsa Zsa Gabor as Zsa Zsa Gabor

Lilli Palmer as Lilli Palmer

Arthur Brauss as Insurance Company Employee (uncredited)

Robert Naegele as Ticket Agent at Airport (uncredited)

Philip Roye as New York Police Sergeant (uncredited)

Udo N. von Tyrol as French Policeman (uncredited)

Monika Zinnenberg as Ticket Agent at Airport (uncredited)