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Released: December 18, 1972 (1972)

Runtime: 101 minutes

Genres: Thriller, Mystery, Horror

While holidaying in Ireland, a pregnant children's author finds her mental state becoming increasingly unstable, resulting in paranoia, hallucinations, and visions of a doppelgänger.

Main Cast (Top 10 billed, oldest first)

John Morley as The Old Man
Age at release: 60
Barbara Baxley as Voice On Telephone (uncredited)
Age at release: 49
Marcel Bozzuffi as René
Age at release: 44
Hugh Millais as Marcel
Age at release: 42
Susannah York as Cathryn
Age at release: 33
René Auberjonois as Hugh
Age at release: 32
Cathryn Harrison as Susannah
Age at release: 13