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