The Man Who Knew Too Much is a 1956 American thriller film produced and directed by Alfred Hitchcock. An English couple, Jill and Bob Lawrence, are on holiday with their teenage daughter Betty. At a party, secret agent Louis Bernard is shot. But before Louis dies, he manages to tell Jill a secret - a foreign ambassador will be murdered by terrorists in London. The terrorists, who are planning the crime, kidnap Betty and transport her to London. Now Jill and Bob must try to save their daughter and the ambassador.