The 39 Steps is a 1935 British
thriller film directed by
Alfred Hitchcock, starring
Robert Donat and
Madeleine Carroll. Based on the 1915 adventure novel
The Thirty-Nine Steps by
John Buchan, the film is about a man in London who tries to help a counter-espionage agent prevent an organisation of spies called The 39 Steps from stealing top secret information. When the agent is killed and he stands accused of the murder, he goes on the run with an attractive woman to save himself and stop the spy ring.