The ailing spouse (Véra Clouzot) and manhandled mistress (Simone Signoret) of a sadistic boarding school headmaster (Paul Meurisse) plan and execute the man's murder -- but their plan goes haywire when the corpse vanishes. Henri-Georges Clouzot directs his real-life wife in this icy, black-and-white masterwork of homicide and Grand Guignol suspense, which ranked No. 49 on the Bravo network's "100 Scariest Movie Moments."