A strangler is loose on a British estate, and he not only strangles his victims but brands an "M" onto their foreheads before he decapitates them.
Claridge Dorsett
Inspector Jeff Mitchell
Judy
Lord Edgar Blackmoor
Lucius Clark
Tavish
Anthony, the butler
Mike Pierce
Dr. Tromby
Gärtner Sebastian
Tom
Watson
Doctor
Philip 'Phips'
(uncredited)
Director
Producer
Screenplay
Director of Photography
Editor
Production Design
Costume Design
Novel
Original Music Composer
Assistant Production Design
Assistant Director
Sound
Unit Manager
Line Producer
