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