The Dark Mirror

A sister and her disturbed twin are implicated in a murder and a police detective must figure out which one's the killer.

• Robert SiodmakDirector
• Dimitri TiomkinOriginal Music Composer
• Nunnally JohnsonWriter

• Olivia de HavillandTerry Collins / Ruth Collins
• Lew AyresScott Elliott
• Thomas MitchellLieutenant Stevenson
• Richard LongRusty
• Charles EvansGirard
• Garry OwenFranklin
• Lela BlissMrs. Didriksen
• Lester AllenGeorge Benson
• Bess FlowersNightclub Patron (uncredited)
• Ida MooreMrs. O'Brien (uncredited)
• Jean AndrenGirard's Secretary (uncredited)
• Marta MitrovichMiss Beade (uncredited)