Cast
John Gregson
Lieutenant Alec Duffy
O.E. Hasse
Captain of the Tirpitz
Lee Patterson
Cox
Cyril Chamberlain
CPO Chubb
Guido Lorraine
Officer Interpreter
Barry Keegan
Sailor on Towing Sub (uncredited)
Frank Lawton
Naval Officer in Briefing Room (uncredited)
James Robertson Justice
Admiral Ryder
Theodore Bikel
German Officer
Harry Towb
McCleery
Anthony Newley
Engineer, X2
John Horsley
Lt. Anderson
William Franklyn
No. 1, X2
Walter Gotell
German Officer on Tirpitz
Michael Medwin
Smart
James Kenney
Abercrombie
Thomas Heathcote
Hutchins
Raymond Francis
Officer on Towing Sub. (1)
John Mills
Commandant Fraser
Donald Sinden
Lieutenant Tom Corbett
William Russell
Ramsey
Tony Wager
George
Lyndon Brook
Diver Navigator, X2