Paranoiac

A family's dark past and a brother's mental illness unravel in a web of deceit and murder. After their parents' death, Simon, a troubled alcoholic, tries to have his sister Eleanor committed to claim the inheritance. But when a mysterious man appears, claiming to be their long-lost brother Tony, things take a deadly turn. As the impostor's true intentions are revealed, secrets are uncovered, and lives are lost, the family's grip on reality frays. Will anyone survive the deadly game of cat-and-mouse?

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Some movies that have similar genres and were produced around the same time as Paranoiac include Psycho, Rosemary's Baby, The Sadist, Night of the Living Dead, City of the Dead (Horror Hotel), Tormented.