

A serial killer who drains his victims for blood is on the loose and London police follow him to a house owned by an eccentric scientist.
Acting
Three horror legends sharing barely any screen time—still magnetic.
Direction
Hessler's chaotic structure somehow enhances the paranoia.
Practical Effects
Gooey vat-of-body-parts finale that'll make you gag-laugh.

Director
Gordon Hessler
Trivia, insights & behind the scenes
Price, Lee and Cushing were filmed on completely different days and never shared a scene—movie magic of the cheapest kind.
This was Christopher Lee's attempt to distance himself from Hammer horror, which makes his casting as yet another mysterious authority figure deeply ironic.
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