Cast
Hugh Sinclair
Robert Southley
Dinah Sheridan
Linda
John Laurie
(I)
(1897–1980)
Inspector MacDougall
Barry Morse
Harrison
Dora Bryan
Maisie
Michael Brennan
Fenton
Beatrice Varley
Landlady
Michael Ward
Wigmaker
Madeline Thomas
Mrs. Green
Ernest Butcher
Mr. Fern
Hal Osmond
Taxi Driver
Sidney Vivian
Barman
Sam Kydd
Mechanic
Anthony Pendrell
Stevens
Writing
John Gilling
Screenplay
Robert S. Baker
Original Story
Carl Nystrom
Adaptation
Camera
Desmond Davis
Clapper Loader
Production
Monty Berman
Producer
Editing
Gerald Landau
Editor