Watch The Dark Mirror (1946) online for free full movie and streaming film in English with HD quality. When Dr. Frank Peralta is found stabbed to death straight to the heart in his apartment, two neighbors verbal abuse to the veteran Lt. Stevenson, who is encounter of the examine, that they saying Ruth Collins desertion his apartment late night. The detective interrogates Ruth and she has the alibi of three witnesses that she was walking re in the Jefferson Park during the night. Then he visits Ruth in her apartment and discovers that she has an identical twin sister called Terry. Lt. Stevenson does not know who the killer is and the prosecutor does not sanction to admission the dogfight. The sisters can not believe to be a job and Dr. Scott Elliott, who is a specialist in twins that had been contacted by Lt. Steenson and has a rout upon Ruth, offers a reasonably priced maintenance to the sisters to be submitted to a series of tests for his research of personalities of twins. Scott finds through the results that Terry is a psychotic woman and Ruth might performance harsh conditions.