A sister and her disturbed twin are implicated in a murder and a police detective must figure out which one's the killer.
Acting
De Havilland's technical miracle—two women, zero confusion.
Cinematography
Ingenious split-screen that still holds up.
Direction
Siodmak milking every shadow for maximum dread.
Director
Robert Siodmak
Olivia de Havilland
Terry Collins / Ruth Collins
Lew Ayres
Dr. Scott Elliott
Thomas Mitchell
Lt. Stevenson
Richard Long
Rusty
Charles Evans
Dist. Atty. Girard
Garry Owen
Franklin
Lela Bliss
Mrs. Didriksen
Lester Allen
George Benson
Bess Flowers
Nightclub Patron (uncredited)
Ida Moore
Mrs. O'Brien (uncredited)
Amelita Ward
Photo-double (uncredited)
William Halligan
Sergeant Temple (uncredited)
Trivia, insights & behind the scenes
De Havilland demanded this role after her studio suspension ended, specifically to shatter her good-girl image from Gone With the Wind.
This film pioneered the 'evil twin' trope in Hollywood, spawning decades of soap opera parodies that obscure its genuinely unsettling psychology.
US
