Diabolique (1955) is a Thriller, Mystery film that follows the cruel and abusive headmaster of a boarding school, Michel Delassalle, is murdered by an unlikely duo -- his meek wife and the mistress he brazenly flaunts. The women become increasingly unhinged by a series of odd occurrences after Delassalle's corpse mysteriously disappears. Currently, you can watch Diabolique on HBO Max Amazon Channel, YouTube TV, Criterion Channel, HBO Max. Streaming availability may vary by country and platform over time. It has a user rating of 7.9 out of 10 from 1,099 votes. Fans of thriller movies may also want to explore similar titles below.