The Man Who Knew Too Much (1934) is a Thriller, Mystery film that follows while vacationing in St. Moritz, a British couple receive a clue to an imminent assassination attempt, only to learn that their daughter has been kidnapped to keep them quiet. Currently, you can watch The Man Who Knew Too Much on Amazon Prime Video, fuboTV, HBO Max, HBO Max Amazon Channel. Streaming availability may vary by country and platform over time. It has a user rating of 6.5 out of 10 from 445 votes. Fans of thriller movies may also want to explore similar titles below.