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