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

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)
Jean Andren
District attorney's secretary (uncredited)
Marta Mitrovich
Miss Beade (uncredited)
Jack Gargan
Waiter (uncredited)

Amelita Ward
Photo-double (uncredited)

William Halligan
Sergeant Temple (uncredited)

Charles McAvoy
Janitor O'Brien (uncredited)

Jack Cheatham
Policeman (uncredited)

Ralph Peters
Dumb cop (uncredited)
Ben Erway
Police Lieutenant (uncredited)

Lane Chandler
Intern (uncredited)
Crew

Robert Siodmak
Director

Nunnally Johnson
Writer, Producer
Ernest J. Nims
Editor

Milton Krasner
Director of Photography
Duncan Cramer
Production Design

Irene Sharaff
Costume Design
Mary Freeman
Hairstylist
Norbert A. Myles
Makeup Artist
Arthur Johns
Sound
Fred Lau
Sound
Devereaux Jennings
Special Effects
Paul K. Lerpae
Special Effects
Eugen Schüfftan
Visual Effects

Dimitri Tiomkin
Original Music Composer

Frank Skinner
Music
Phyllis Loughton
Dialogue Coach
Hugh Hunt
Set Decoration

Vladimir Pozner
Original Story
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