John Wengraf
Gunther Rudehoff, Gestapo Agent
Anthony Caruso
Benny, Seaman's Union Hall Man (uncredited)
John Abbott
Alfonse Lamont
Bruce Bennett
Archie Gibbs
Ray Teal
C.P.O. Shaw (uncredited)
Trevor Bardette
Convoy Ship Commander (uncredited)
Robert B. Williams
Destroyer Commander Tom Bristol
Erik Rolf
Kapitaen Ganz, The U-Boat Captain
Eric Feldary
Hans Braustig, Injured Sailor (uncredited)