U-Boat Prisoner 1944

Merchant seaman Archie Gibbs manages to survive when his ship is torpedoed by a German submarine. Disguising himself in the uniform of a dead Nazi spy, Gibbs is picked up by the Nazi U-boat. He manages to convince the German sailors that he's the spy, and in this guise he tries to rescue a group of captured Allied scientists.

Cast:

Bruce Bennett
Archie Gibbs 

Erik Rolf
Kapitaen Ganz, The U-Boat Captain 

John Abbott
Alfonse Lamont 

John Wengraf
Gunther Rudehoff, Gestapo Agent 

Robert B. Williams
Destroyer Commander Tom Bristol 

Trevor Bardette
Convoy Ship Commander (uncredited)