The Spy in Black
Director: Michael Powell
This is the VHS release (see more).
SummaryIn this feature, set during World War I, a U-boat is sent to the Orkneys on a mission to destroy the British fleet. The U-boat captain makes contact with the Kaiser's spy-on-the-spot in these northern islands, only to learn she is not what she seems. A tale of espionage and counter-espionage.
NotesBased on a novel by J. Storer Clouston. Also called U-Boat 29.
Get Spy in Black, The now at amazon.co.uk