Jonathan Corliss murders his girlfriend Dorothy and moves onto her twin sister Ellen who grows suspicious of her new lover as he charms his way into their family and impresses their father T... Read allJonathan Corliss murders his girlfriend Dorothy and moves onto her twin sister Ellen who grows suspicious of her new lover as he charms his way into their family and impresses their father Thor Carlsson. Based on Ira Levin's novel.Jonathan Corliss murders his girlfriend Dorothy and moves onto her twin sister Ellen who grows suspicious of her new lover as he charms his way into their family and impresses their father Thor Carlsson. Based on Ira Levin's novel.