Conrad Veidt, Valerie Hobson, Hay Petrie, Joss Ambler, Raymond Lovell, Esmond Knight, Charles Victor, Phoebe Kershaw, Harold Warrender, John Longden, Eric Maturin, Dennis Arundell, Molly Hamley-Clifford, Eric Berry, Paddy Browne
When a neutral Danish merchant ship is forced to put into port after trying to evade British wartime contraband control, its captain becomes involved in a beautiful British Naval Intelligent agent's efforts to capture a group of German spies operating from a London cinema.
When Conrad Veidt's Danish freighter is routinely stopped by the Royal Navy in search of contraband; he is held over for 24 hours. He manages to get hold of two shore passes for himself and his first mate, but they are stolen and as he investigates, he encounters Valerie Hobson, the mysterious "Mrs. Sorensen" and soon is embroiled in a top secret Nazi espionage conspiracy. Just as with "the Spy in...