1963's "The Strangler of Blackmoor Castle" (a literal translation of "Der Wurger von Schloss Blackmoor") was among the more popular krimi to emerge from West Germany, crime thrillers based on the works of Edgar Wallace or, in this case, his son Bryan Edgar Wallace. More straightforward than some of the more convoluted entries, the prolific Harald Reinl directing his young wife Karin Dor to play Claridge Dorsett, reporter/niece of diamond smuggling uncle Lucius Clark (Rudolf Fernau), both renting the huge castle of Blackmoor from its eccentric, tax burdened owner (Hans Nielsen). There is indeed a strangler on the loose, wearing a mask to completely cover his face (very similar to the culprit in Lew Landers' 1962 "Terrified"), later revealed by Scotland Yard's Inspector Jeff Mitchell (Harry Riebauer) to have only 9 fingers. When he can't get his hands on them he sets traps like a line across the road to behead one cycling victim, the letter 'M' a calling card branding their foreheads. The moor is dotted with hidden passages that occasionally turn up (or drop in), while Clark's ex-con diamond cutter (Dieter Eppler) seems especially determined to prevent Claridge from earning her share of the estate on her 21st birthday. A spot of blackmail finds several shady types frequenting a certain London tavern, but most of the mayhem takes place on the foggy marshes or inside the castle, a suitably eerie setting for added horror atmosphere. What sets this apart from the others is to be a virtual blueprint for the more violent Giallo, as there's little blood shown but times would change by decade's end.