Frenzy actual London serial murder cases: the Christie murders in the early 1950s, and the Jack the Ripper murders in 1888. Barry Foster has said that, in order to prepare for his role, he was asked by Hitchcock to study two books about Neville Heath, an English serial killer who would often pass himself off as an officer in the RAF. "Frenzy" was the third and final film that Hitchcock made in Britain after he moved to Hollywood in 1939. The other two were "Under Capricorn" in 1949 and "Stage Fright" in 1950 (although there were some interior and exterior scenes
The Man Who Knew Too Much (book) "The Five of Swords" and "The Tower of Treason". The 1934 and 1956 films have nothing except the title in common with this book. Alfred Hitchcock, who directed both films, decided to use the title because he held the film rights for some of the stories in the book. The stories were first published in Harper's Monthly Magazine between April 1920 and June 1922: Other stories that were added in the book: Horne Fisher, "The Man Who Knew Too Much", is the main protagonist of the first eight stories. In the final story, "The Vengeance of the Statue", Fisher notes: