A famous mystery writer uses his own plot tricks to murder a blackmailer in this British thriller.
Hugh Sinclair
Robert Southley
Dinah Sheridan
Linda
John Laurie
Inspector MacDougall
Barry Morse
Harrison
Dora Bryan
Maisie
Michael Brennan
Fenton
Beatrice Varley
Landlady
Michael Ward
Wigmaker
Madoline Thomas
Mrs. Green
Ernest Butcher
Mr. Fern
Hal Osmond
Taxi Driver
Sidney Vivian
Barman
Carl Nystrom
Adaptation
Robert S. Baker
Original Story
John Gilling
Screenplay
Monty Berman
Producer
Desmond Davis
Clapper Loader
Gerald Landau
Editor
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