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Gumnaam is a 1965 Indian Hindi-language mystery film directed by Raja Nawathe and produced by N. N. Sippy. The film was released in India on 24 December 1965 and stars an ensemble cast of Manoj Kumar, Nanda, Mehmood, Pran, Helen, Madan Puri, Tarun Bose, Dhumal and Manmohan. The film is a loosely inspired adaptation of Agatha Christie's 1939 mystery novel And Then There Were None and was remade in Tamil as Naalai Unathu Naal (1984). In the film, eight people find themselves stranded on a remote island after winning a contest. As soon as they settle down in an eerie mansion with a strange butler, the guests begin to get murdered one after the other.