The Spy in Black (1939) is a British espionage World War One submarine and double agent spy noir, and the first collaboration between the filmmakers Michael Powell and Emeric Pressburger.
These two visionaries of the mid-century were brought together by Alexander Korda to make this World War I spy thriller novel of the same title by Joseph Storer Clouston into a film.
Powell and Pressburger eventually made over 20 films during the course of their partnership.