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Mara is a 2018 American supernatural horror film directed by Clive Tonge in his feature-length debut and written by Jonathan Frank. The film stars Olga Kurylenko as criminal psychologist Kate Fuller, who investigates the murder of a man and is haunted by the eponymous demon who kills people in their sleep. The film also stars Craig Conway. Tonge and Frank based the film's story on conditions and mythology surrounding both sleep paralysis and Brugada syndrome. The film was released by Saban Films on September 7, 2018. It received negative reviews from critics and was a box office bomb.