"A German submarine is sent to the Orkney Isles in 1917 to sink the British fleet."
Conrad Veidt
as Captain Ernst Hardt
Sebastian Shaw
as Ashington
Valerie Hobson
as The School Mistress
Marius Goring
as Lieutenant Felix Schuster
June Duprez
as Anne Burnett
Athole Stewart
as The Rev. Hector Matthews
Agnes Lauchlan
as Mrs. Matthews
Helen Haye
as Mrs. Sedley
Cyril Raymond
as The Rev. John Harris
George Summers
as Captain Ratter
Hay Petrie
as Engineer
Grant Sutherland
as Bob Bratt
Robert Rendel
as Admiral
Mary Morris
as Chauffeuse
Margaret Moffatt
as Kate
Kenneth Warrington
as Commander Denis
Torin Thatcher
as Submarine Officer
Esma Cannon
as Maggie
Cyril Chamberlain
as Bit Part (uncredited)
Bryan Herbert
as Corporal Guarding POW's on Ferry
Skelton Knaggs
as German Sailor looking for Capt. Hardt
Howard Marion-Crawford
as German Officer in Kieler Hof Hotel
Bernard Miles
as Hans - Hotel Receptionist
John Penrose
as Newlywed at Kiel Hotel
Johnnie Schofield
as Armed Guard of POWs on Ferry
Diana Sinclair-Hall
as Undetermined Minor Role (uncredited)
Graham Stark
as Bell Boy (uncredited)
Jack Lambert
as Passport Official (uncredited)
Jeanne Macintyre
as German Girl (uncredited)
Jack Sharp
as
Michael Powell
Director
J. Storer Clouston
Story
Frederick Pusey
Art Direction
Roland Pertwee
Scenario Writer
Irving Asher
Producer
Emeric Pressburger
Screenplay
Hugh Stewart
Editor
Miklós Rózsa
Original Music Composer
Patrick Jennings
Assistant Director
Bernard Browne
Director of Photography
John W. Mitchell
Boom Operator
Alexander Korda
A.W. Watkins
Sound Director
William Hornbeck
Supervising Film Editor
Muir Mathieson
Music Director
Vincent Korda
Supervising Art Director
