Robert Siodmak
Director
Nicholas Musuraca
Director of Photography
Dore Schary
Producer
Harry Gerstad
Editor
Harry Marker
Editor
Ethel Lina White
Novel
Mel Dinelli
Screenplay
Roy Webb
Original Music Composer
Albert S. D'Agostino
Art Direction
Jack Okey
Art Direction
Darrell Silvera
Set Decoration
Harry Scott
Assistant Director
John L. Cass
Sound
Terry Kellum
Sound
Vernon L. Walker
Special Effects
Chris Crowell
Digital Compositor
Gordon Carveth
Stunts
C. Bakaleinikoff
Music Director
Samuel Hoffman
Musician
Edgar Peterson
Production Assistant
Fred Fleck
Production Manager
Edward Stevenson
Costume Design
Dorothy McGuire
Helen
George Brent
Professor Warren
Ethel Barrymore
Mrs. Warren
Kent Smith
Dr. Parry
Rhonda Fleming
Blanche
Gordon Oliver
Steve Warren
Elsa Lanchester
Mrs. Oates
Sara Allgood
Nurse Barker
Rhys Williams
Mr. Oates
James Bell
Constable
Erville Alderson
Dr. Harvey (uncredited)
Ellen Corby
Neighbour (uncredited)
Myrna Dell
Murder Victim (uncredited)
George Holmes
The Killer's 'Shadow' (uncredited)
Stanley Price
Starry-eyed Man (uncredited)
Robert Siodmak
The Killer's 'Eye' (uncredited)
Richard Tyler
Freddy (uncredited)
Charles Wagenheim
Desk Clerk (uncredited)
Larry Wheat
Minister (uncredited)
