The Spy in Black
A tense thriller set in World War One. Captain Hardt (Conrad Veidt) is ordered to take his U-boat to Northern Scotland, where he must contact a fellow conspirator and sink the British fleet. The contact, however, turns out to be a beautiful schoolmistress (Valerie Hobson) who acts as a go-between with the British Navy traitor, Lieutenant Ashington (Sebastian Shaw). The jealousy between the two men over the young woman leads to their plans falling apart, with one of them being left to complete the mission alone. Written by Emeric Pressburger.