The Dark Mirror

A murder is committed , and identical twin sisters , Ruth and Terry (Olivia de Havilland) are suspects . A prominent psychologist (Lew Ayres) and a detective (Thomas Mitchell) investigate the deeds to determine which good-bad siblings killed the mysterious corpse , because one of whom is a psycho and nutty woman .

This noir film contains suspense , tensions , psychological drama , a love story and is quite entertaining . Excellent actress Olivia De Havilland gives a completely convincing tour-de-force as a dual role as good and bad girl . Good and fine support cast as Lew Ayres , Thomas Mitchell, Gary Owen and Richard Long . Startling finale climax with an amazing plot twist . Nice special effects perfectly adapted , enabling De Havilland to play two diverse characters , FX are stunningly made by Deveraux Jennins . This psychological thriller has an interesting screenplay brilliantly written by Nunnally Johnson , also producer. Atmospheric musical score by Dimitri Tiomkin based on classic music and evocative cinematography in lights and shades by Milton Krasner . This was first film produced by the new joint venture Universal Pictures-International Pictures . The motion picture was well directed by German director Robert Siodmak who realized his best films during the 40s . His movies reflect a world of desperation , of dark , of threat and killing . The Siodmak's best films are¨ Phantom Lady¨, ¨The spiral staircase¨ and especially : ¨Criss Cross and ¨The killers¨-both starred by Burt Lancaster-, now acknowledged as a classic noir films in which Robert Siodmak set the pattern of the rest of his Hollywood's work, and of course ¨Dark mirror¨.