In World War II, the greatest threat to the British navy is the German battleship Tirpitz. While anchored in a Norwegian fjord, it is impossible to attack by conventional means, so a plan is hatched for a special commando unit to attack it, using midget submarines to plant underwater explosives.
Commandant Fraser
Lieutenant Alec Duffy
Lieutenant Tom Corbett
Admiral Ryder
Smart
German Officer
Abercrombie
Ramsey
Captain of the Tirpitz
Cox
McCleery
CPO Chubb
George
Winley
Diver Navigator, X2
Hutchins
Engineer, X2
Lt. Anderson
No. 1, X2
Officer Interpreter
Officer on Towing Sub. (1)
Officer on Towing Sub. (2)
German Officer on Tirpitz
RAF Officer (uncredited)
German Navy Officer (uncredited)
Sailor on Towing Sub (uncredited)
Naval Officer in Briefing Room (uncredited)
