} The Man Who Knew Too Much is a 1934 suspense film directed by Alfred Hitchcock and released by Gaumont British. It was one of the most successful and critically acclaimed films of Hitchcock's British period.

Hitchcock remade the film in 1956 for Paramount Pictures, the only such work he would revisit.

The Man Who Knew Too Much is a 1956 suspense film directed by Alfred Hitchcock, starring James Stewart and Doris Day. It is a remake in widescreen VistaVision and Technicolor of Hitchcock's 1934 film of the same name. In the newer version, one of the most financially successful films of its year of release, Brenda De Banzie and Bernard Miles play an apparently benign British married couple, Christopher Olsen plays the son of Day and Stewart, and Reggie Nalder and Daniel Gélin are featured as assassins.

In the book-length interview, Hitchcock/Truffaut (1967), Hitchcock told fellow filmmaker François Truffaut that he considered his 1956 remake to be superior, saying that the 1934 version was the work of a talented amateur, the 1956 version the work of a professional.

The film won an Academy Award for Best Song for "Whatever Will Be, Will Be (Que Sera, Sera)," sung by Doris Day at several points in the action.

Dr. Ben McKenna, his wife Jo and their son Hank are on a touring holiday of Africa when they meet the mysterious Louis Bernard on a bus. The next day Bernard is murdered in the local marketplace, but before he dies he manages to reveal details of an assassination about to take place in London. Fearing that their plot will be revealed, the assassins kidnap Hank in order to keep the McKenna's silent. Ben and Jo go to London and take matters into their own hands. Written by Col Needham

The man who knows too much is American doctor Ben McKenna. On holiday in Morocco with his wife Jo and his eight-year-old son Hank, he inadvertently witnesses a murder in a market and becomes privy to a plot of political assassination. This being masterminded by the Draytons, an English couple they have met in a restaurant, and is due to take place in London in a few days' time. In order to prevent McKenna from going to the police, the couple kidnap Hank. Ben is warned not to tell the police what he knows. Hank's life depends on his silence. Written by filmfactsman

Bob and Jill Lawrence are on a winter sports holiday with their teenage daughter Betty. When their friend Louis Bernard is shot whilst dancing with Jill, he tells Bob of an assassination about to take place in London. Fearing that their plot will be revealed, the assassins kidnap Betty in order to keep the Lawrence's quiet. Bob and Jill return to London and take matters into their own hands. Written by Col Needham

Bob Lawrence (Banks) and his crack-shot wife, Jill (Best) are holidaying in Switzerland when their French friend, Louis Bernard (Frensay) is gunned down, warning them, with his dying breath, of an imminent diplomatic assassination. To ensure the couple's silence, the conspirators kidnap their daughter (Nova Pilbeam). However, Abbot (Lorre) and his comrades have fatally underestimated British pluck. Written by comicfan

Jill and Bob Lawrence are on a winter holiday with their daughter, Betty. While he is dancing with Jill, the secret agent Louis Bernard is shot to death. With his last words he tells Jill about an assassination planned by some terrorists, about to take place in London. Fearing their plan would be revealed, the spies kidnap Betty and carry her off to London with them. Bob and Jill come back to London too, searching for their daughter. Written by Claudio Sandrini