Cast
Bernard Miles
Royal Navy Mate
Morland Graham
Civil Service
George Merritt
German: German Shelter Marshal
Will Hay
Skipper
Frank Cellier
Schneider
John Stuart
Royal Navy: Naval Officer
Ronald Adam
German businessman (uncredited)
Michael Rennie
George
Robert Morley
Von Geiselbrecht
Alfred Drayton
Direktor
Albert Lieven
Gunter
Cyril Chamberlain
Press
George Woodbridge
Quisling
Ronald Shiner
Shipping clerk (uncredited)
Manning Whiley
Naval officer (uncredited)
John Mills
Tom
John Boxer
Press
Thora Hird
German barmaid (uncredited)
Leslie Banks
Taylor
Austin Trevor
U-boat Captain
Frederick Piper
Malta official (uncredited)
Michael Redgrave
Russian
Marius Goring
German Propaganda Officer
Michael Wilding
Captain (uncredited)
John Williams
Voice over (uncredited)