Many novels in the spy fiction genre have been adapted as films, including works by John Buchan, le Carré, Ian Fleming (Bond) and Len Deighton.
These fears produced the British 1914 The German Spy Peril, centered on a plot to blow up the Houses of Parliament, and 1913's O.H.M.S.,[4] standing for "Our Helpless Millions Saved" as well as On His Majesty's Service (and introducing for the first time a strong female character who helps the hero).
Lang's Dr. Mabuse films from the period also contain elements of spy thrillers, though the central character is a criminal mastermind only interested in espionage for profit.
Alfred Hitchcock did much to popularize the spy film in the 1930s with his influential thrillers The Man Who Knew Too Much (1934), The 39 Steps (1935), Sabotage (1937) and The Lady Vanishes (1938).
On the one hand, the realistic spy novels of Len Deighton and John le Carré were adapted into relatively serious Cold War thrillers that dealt with some of the realities of the espionage world.
Some of these films included The Spy Who Came in from the Cold (1965), The Deadly Affair (1966), Torn Curtain (1966), and the Harry Palmer series, based on the novels of Len Deighton.
In another direction, the James Bond novels by Ian Fleming were adapted into an increasingly fantastical series of tongue-in-cheek adventure films by producers Harry Saltzman and Albert R. Broccoli, with Sean Connery as the star.
Notable examples include the two Derek Flint films starring James Coburn, The Quiller Memorandum (1966) with George Segal, and the Matt Helm series with Dean Martin.