Movies and TvShows featuring "parasitic-twin" theme.

Madison is paralyzed by shocking visions of grisly murders, and her torment worsens as she discovers that these waking dreams are in fact terrifying realities. In 1993, Gabriel, a patient at Simion Research Hospital, turns violent and kills several staff members. Twenty-eight years later, Madison, a pregnant woman, returns home to find her husband dead and is attacked by the killer. Gabriel kidnaps another woman, and Madison must confront her past and the connection between Gabriel and her childhood. As Gabriel takes control of her body, Madison must find a way to defeat him and reclaim her life.

Thad Beaumont, a successful writer, creates a pseudonym for his violent and disturbing stories. But when his pseudonym takes on a life of its own as a murderous alter ego, Thad must confront his darkest secrets and save himself from his own creation.