The House That Dripped Blood (1971)

A Scotland Yard investigator looks into four mysterious cases involving an unoccupied house and its tragic previous tenants: 1) A hack novelist encounters a strangler who's the villain of his books, leading his wife to question his sanity, 2) Two men are obsessed with a wax figure of a woman from their past, 3) A little girl with a stern, widowed father displays an interest in witchcraft, and 4) An arrogant horror film actor purchases a black cloak which gives him a vampire's powers.