THE MAN WHO KNEW TOO MUCH is Alfred Hitchcock's remake of his 1935 movie of the same name.
Ben McKenna (Stewart), an American doctor, and his family stumble into the middle of an assassination plot while vacationing in Marrakech. When his son is kidnapped by the conspirators, McKenna must race against the clock to stop the murder and save his son's life. Stewart, as one might expect, gives a seamless performance as the average man thrown into exceptional circumstances. Day brings a bit of levity and performs the only musical number to appear in a Hitchcock film. (The song, "Que Sera, Sera," would win an Oscar and become a popular hit.) This later version of Hitchcock's suspenseful film also features the masterful Albert Hall sequence, arguably almost the equal of the renowned plane sequence in NORTH BY NORTHWEST.