Dan McCormick
Lon Chaney Jr.
Dr. Paul Rigas
Lionel Atwill
Dr. Bruno
George Meader
Detective
Frank O'Connor
Medical Examiner
John Dilson
Alienist #2
Byron Foulger
Mrs. Frank Davis (uncredited)
Jessie Arnold
Charlie, Prison Guard (uncredited)
James Blaine
Radio Announcer (uncredited)
Gary Breckner
Jury Foreman (uncredited)
Lowell Drew
Assistant District Attorney (uncredited)
John Ellis
Police Radio Announcer (uncredited)
Douglas Evans
June Lawrence
Anne Nagel
Reporter (uncredited)
Jack Gardner
Mike - Dynamo Operator (uncredited)
William Hall
Warden Harris (uncredited)
Russell Hicks
Judge (uncredited)
Wright Kramer
Detective (uncredited)
Tom Quinn
Prison Guard (uncredited)
Bob Reeves
Defense Attorney (uncredited)
Mel Ruick
Frank Davis (uncredited)
Francis Sayles
Prison Chaplain (uncredited)
Paul Scott
Hay Wagon Passenger (uncredited)
David Sharpe
Mark Adams
Frank Albertson
Dynamo Operator #2 (uncredited)
Victor Zimmerman
Corky the Dog (uncredited)
Corky
Dr. John Lawrence
Samuel S. Hinds
District Attorney Ralph B. Stanley
William B. Davidson
Detective Sergeant Regan
Ben Taggart
Nurse
Constance Bergen
Doctor
Ivan Miller
Chinese Boy, Wong
Chester Gan
Stunts
Music
Frank Skinner
Makeup Artist
Jack Pierce
Director
George Waggner
Screenplay
Story
Harry Essex
Len Golos
Sid Schwartz
Orchestrator
Charles Previn
Charles Henderson
Sound Supervisor
Bernard B. Brown
Music Director
Hans J. Salter
Art Direction
Harold H. MacArthur
Technical Supervisor
Eric Wybrow
Original Music Composer
Jack Otterson
Associate Producer
Jack Bernhard
Director of Photography
Elwood Bredell
Editor
Arthur Hilton
Set Decoration
Russell A. Gausman
Costume Design
Vera West
Special Effects
John P. Fulton
Sound
Charles Carroll