"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."
Karin Dor
as Claridge Dorsett
Harry Riebauer
as Inspector Jeff Mitchell
Ingmar Zeisberg
as Judy
Walter Giller
as Lord Edgar Blackmoor
Rudolf Fernau
as Lucius Clark
Hans Nielsen
as Tavish
Dieter Eppler
as Anthony, the butler
Hans Reiser
as Mike Pierce
Richard Häussler
as Dr. Tromby
Albert Bessler
as Gärtner Sebastian
Peter Nestler
as Tom
Gerhard Hartig
as Watson
Carl de Vogt
as Doctor
Stephan Schwartz
as Philip 'Phips'
Werner Schott
as
Egon Vogel
as (uncredited)
Harald Reinl
Director
Artur Brauner
Producer
Gustav Kampendonk
Screenplay
Ladislas Fodor
Ernst W. Kalinke
Director of Photography
Werner Achmann
Production Design
Walter Wischniewsky
Editor
Irms Pauli
Costume Design
Bryan Edgar Wallace
Novel
Oskar Sala
Original Music Composer
Sylvia Ponsold
Assistant Production Design
Charles M. Wakefield
Assistant Director
Erwin Schänzle
Sound
Herbert Maris
Unit Manager
Rudolf Gürlich
Eberhard Meichsner
Line Producer