The Man Who Knew Too Much (1934) starring Leslie Banks, Edna Best,  Peter Lorre, by Alfred Hitchcock

Editorial review of The Man Who Knew Too Much courtesy of Amazon.com

 Alfred Hitchcock himself called this 1934 British edition of his famous kidnapping story the work of a talented amateur, while his 1956 Hollywood remake was the consummate act of a professional director. Be that as it may, this earlier movie still has its intense admirers who prefer it over the Jimmy Stewart-Doris Day version, and for some sound reasons. Tighter, wittier, more visually outrageous (back-screen projections of Swiss mountains, a whirly-facsimile of a fainting spell), the film even has a female protagonist (Edna Best in the mom part) unafraid to go after the bad guys herself with a gun. (Did Doris Day do that that? Uh-uh.)