Cast
Cmdr. Robert «Bob» Kingsley
Anna Marie Von Steuben
Fraulein Lolita
Chief Mike «Guns» Costello
«Lug» Kaufman
Ens. Richard «Dick» Cabot
Chief Joe CobbLt. «Mac» McGregor 
Baron Ernst von Steuben (U-boat commander)
Franz ShillerGerman Chief Petty Officer, not listed in credits Naval Reservist, not listed in credits Naval Reservist / Swimmer and Diver, not listed in credits Naval Reservist, not listed in credits 
Mugs O'Flaherty, not listed in creditsNaval Reservist, not listed in credits Naval Reservist, not listed in credits 
Eric - Captain of Trawler, not listed in creditsNaval Reservist, not listed in credits Fritz Kampf (Second Officer of U-172), not listed in credits Hoffman, not listed in credits Naval Reservist, not listed in credits Naval Reservist, not listed in credits Naval Reservist, not listed in credits Elmer Harrigan, not listed in credits Naval Reservist / Swimmer and Diver, not listed in credits Naval Reservist, not listed in credits Naval Reservist, not listed in credits Bugler on Gun Crew, not listed in credits Naval Reservist, not listed in credits Merkel, not listed in credits Naval Reservist, not listed in credits Naval Reservist, not listed in credits 
«Butch» Wagner, not listed in credits«Skits» Reilly, not listed in credits Gunner, not listed in credits German Officer, not listed in credits Adolph Brucker, not listed in credits Naval Reservist, not listed in credits 
Gunner and drill sergeant, not listed in creditsGerman Chief Petty Officer, not listed in credits Naval Reservist, not listed in credits 
Winkler, not listed in creditsNaval Reservist / Swimmer and Diver, not listed in credits Naval Reservist / Swimmer and Diver, not listed in credits Levinsky, not listed in credits German Chief Petty Officer, not listed in credits 
