Dirk Bogarde
— Simon Van Halder
Mai Zetterling
— Anna DeBurg
Philip Friend
— Capt. Bob Sawyer
Albert Lieven
— Paul Ravitch, alias Schleger
Fritz Wendhausen
— Warder Goeter
Carl Jaffe
— Cellblock Guard Becker
Gerard Heinz
— German Prison Doctor
Andre Mikhelson
— Polizei Inspector
Harold Ayer
— Capt. Trevor Wood, U.S. Army
Walter Gotell
— Ravitch's Servant-Henchman
Friedrich Joloff
— Valentin Vladek, alias Winter
Simone Silva
— Mink, Valentin's girl
Theodore Bikel
— Anton
Ferdy Mayne
— Berlin detective
Walter Rilla
— Colonel Bertrand
Paul Hardtmuth
— Ship's Watchman
Vernon Morris
— German boy