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