The Man Who Knew Too Much
(1956)

Jo (Doris Day) stops the assassination plot against the Ambassador (played by Mogens Wieth). She and Ben (James Stewart) are hailed as heroes and welcomed in the Ambassador's residence, where Hank (Christopher Olsen) is being held. Mrs. Drayton (Brenda De Banzie) can't go through with killing Hank and decides to let him go. Ben eventually finds Hank, but Mr. Drayton (Bernard Miles) catches them before they can escape. Drayton tries to take them as hostages, but when they reach a staircase, Ben fights him off and kills him.

Thanks Sam!