Bruce Bennett

as Archie Gibbs

Erik Rolf

as Kapitaen Ganz, The U-Boat Captain

John Abbott

as Alfonse Lamont

John Wengraf

as Gunther Rudehoff, Gestapo Agent

Robert B. Williams

as Destroyer Commander Tom Bristol

Trevor Bardette

as Convoy Ship Commander (uncredited)

Anthony Caruso

as Benny, Seaman's Union Hall Man (uncredited)

Eric Feldary

as Hans Braustig, Injured Sailor (uncredited)