How Kitchener Was Betrayed (1921)
How Kitchener Was Betrayed is a 1921 British silent war film directed by Percy Nash and starring Fred Paul, Winifred Evans and Bertram Burleigh. It was a fictional portrayal of the events leading up to the death of Herbert Kitchener on HMS Hampshire during the First World War in which the German secret service receive warning of the General's activities through a German agent Elbie Böcker. The film was intended to cash in on the controversy raised by the publication of a biography of Kitchener in 1920 challenging the Admiralty's official conclusion that the ship was sunk by a mine. Only one of its six reels survives.
More at Wikipedia.