The Strangler of Blackmoor Castle () is a 1963 West German thriller film directed by Harald Reinl and starring Karin Dor, Harry Riebauer and Rudolf Fernau.Bergfelder p. 257 It was based on a story by Bryan Edgar Wallace and was part of a trend of British-set thrillers inspired by Rialto Film's series of adaptations of his father Edgar Wallace's work.
Plot A series of murders are committed by a masked assailant take place near Blackmoor Castle, whose gruesome calling card is to carve the letter 'M' into the decapitated heads of their victims. The assassin demands that the tenant, the soon-to-be-ennobled Lucius Clark, claims to be the rightful owner of stolen rough diamonds that Clark has hidden on the property. Clark initially suspects the phantom of being the actual owner of the castle, the impoverished Lord Blackmoor. But soon, more suspects emerge.
Cast
Production The film was shot at Spandau Studios and on-location in Berlin, while a second unit traveled to London to shoot some location exteriors. The exteriors of "Blackmoor Castle" were shot at Mendelssohn Palace and at Park Glienicke. The film's sets were designed by the art director Werner Achmann.
Release The film premiered in Cologne in 21 June 1963.
Home media A remastered Blu-Ray was released by Eureka Entertainment as part of their Terror in Fog: Wallace Krimi at CCC boxset, in May 2025.
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