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Mary (1931) is a British-German thriller film, directed by Alfred Hitchcock, and is the German-language version of Hitchcock's Murder! (1930), shot simultaneously on the same sets with German-speaking actors. The film is based on the 1928 book Enter Sir John by Clemence Dane and Helen Simpson, and stars Alfred Abel and Olga Chekhova. Miles Mander reprises his role as Gordon Druce from Murder!, though the character's name was changed to Gordon Moore.