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.

• Columbia Pictures
• Bruce Bennett
• Erik Rolf
• John Abbott
• John Wengraf
• Robert B. Williams
• Trevor Bardette
• Anthony Caruso
• Eric Feldary