Kadro (15)
Montgomery CliftProfessor James Bower
Hardy KrügerCounselor Peter Heinzmann
Macha MérilFrieda Hoffmann
David OpatoshuOrlovsky
Christine DelarocheIngrid Weiß
Hannes MessemerDr. Saltzer
Karl LieffenMajor Windisch
Uta LevkaMädchen unter der Dusche
Roddy McDowallAgent Adams
Johannes BuzalskiAgent (uncredited)
Eckart DuxProfessor James Bower (voice) (uncredited)
Jean-Luc GodardOrlovsky's Friend (uncredited)
Eduard LinkersFluchthelfer Franz Ritter (uncredited)
Franz RudnickDr. Saltzer (voice) (uncredited)
Rolf ZacherTommy (uncredited)