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.
Unfortunately the movie The Strangler of Blackmoor Castle is not yet available on HBO Max.
| Directing | Harald Reinl | Director |
| Writing | Ladislas Fodor | Screenplay |
| Production | Artur Brauner | Producer |
| Camera | Ernst W. Kalinke | Director of Photography |
| Writing | Gustav Kampendonk | Screenplay |
| Costume & Make-Up | Irms Pauli | Costume Design |
| Editing | Walter Wischniewsky | Editor |
| Art | Werner Achmann | Production Design |
| Writing | Bryan Edgar Wallace | Novel |
| Sound | Oskar Sala | Original Music Composer |
| Art | Sylvia Ponsold | Assistant Production Design |
| Directing | Charles M. Wakefield | Assistant Director |
| Sound | Erwin Schänzle | Sound |
| Production | Herbert Maris | Unit Manager |
| Production | Rudolf Gürlich | Unit Manager |
| Production | Eberhard Meichsner | Line Producer |
