Curse of the Black Widow (1977)

Private eye Franciosa is hired by nervy Mills to investigate her husband's death, only to find this leads to a series of murders of men close to her, where the victims are coccooned and filled with venom. Cop Morrow is suitably exasperated and encourages Franciosa to find a solution he can put in a report. This picture allows Curtis full rein to create an outlandish horror story, populated by distinct characters, played by versatile actors. Special effects are excellent and used sparingly. Franciosa is effortless as the insouciant detective whose initial scepticism crumbles as he learns more about Mills family, including mom Lockhart and icy sister Duke.