| Crime, Drama, Thriller
During the Cold War, a RN warrant officer stationed in the British Embassy in Warsaw leaks secrets to his Polish girlfriend who's a Soviet agent and after his transfer to a naval station in Britain he joins a Soviet spy ring.
Do you have any images for this title?
45 Cranley Drive, Ruislip which features as the Krogers' home, was their actual address in real life, from which they transmitted messages to Moscow. A second transmitter was found at the bottom of the garden in 1980.
Harry Houghton is shown signing the Official Secrets Act by the date "September 1950", establishing the time when he joined the Portland Underwater Weapons Establishment. But in the scene immediately prior to this, while he is being driven to Portland, the cars in the background are contemporary to the film's 1963 production, specifically two early 1960s Ford Anglias and a Morris Minor with post-1956 styling.
Disclaimer in closing credits: "Although the substance of this film is based upon true events and the leading characters depict actual persons, neither the officials portrayed, nor their establishments, officers or places of work, are based upon real places or actual individuals."