The 39 Steps (1978) (UK-import)
It is 1914. Europe is on the brink of war. London seems peaceful enough but a dangerous conspiracy is underway... Colonel Scudder of the British Intelligence has unearthed a plot to assassinate the Greek Prime Minister on a visit to London and thus precipitate World War 1. Richard Hannay, an engineer on leave in London, becomes implicated and there follows an exciting series of hair's breadth escapes, of plot and coounterplot, as Hannay attempts to solve the riddle of the Thirty Nine Steps...