A famous mystery writer uses his own plot tricks to murder a blackmailer in this British thriller.

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Main Cast: Hugh Sinclair, Dinah Sheridan, John Laurie, Barry Morse, Dora Bryan, Michael Brennan, Beatrice Varley, Michael Ward, Madoline Thomas, Ernest Butcher

Director: John Gilling

Writer: John Gilling

Editor: Gerald Landau

Cinematographer:

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