Diagnosis: Murder (1974)

A psychiatrist, driven by his desire to be with his mistress, devises a sinister plan to eliminate his wife. However, before he can execute his intentions, she vanishes without a trace, throwing his life into turmoil. As he navigates the fallout of her disappearance, the tension mounts, and secrets begin to unravel, leading to a chilling exploration of betrayal and deceit. The mystery surrounding her fate forces him to confront the dark consequences of his ambitions, ultimately challenging the boundaries of morality and sanity.