Cast
A German submarine is sent to the Orkney Isles in 1917 to sink the British fleet.
Conrad Veidt (Acting)
Sebastian Shaw (Acting)
Valerie Hobson (Acting)
Marius Goring (Acting)
June Duprez (Acting)
Athole Stewart (Acting)
Agnes Lauchlan (Acting)
Helen Haye (Acting)
Cyril Raymond (Acting)
Hay Petrie (Acting)
Robert Rendel (Acting)
Mary Morris (Acting)
Torin Thatcher (Acting)
Esma Cannon (Acting)
Cyril Chamberlain (Acting)
Bryan Herbert (Acting)
Skelton Knaggs (Acting)
Howard Marion-Crawford (Acting)
Bernard Miles (Acting)
John Penrose (Acting)
Johnnie Schofield (Acting)
Graham Stark (Acting)
Jack Lambert (Acting)
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