Casting

Director

George Waggner

Screenplay

George Waggner

Story

Harry Essex, Len Golos, Sid Schwartz

Original Music Composer

Hans J. Salter

Director of Photography

Elwood Bredell

Editor

Arthur Hilton

Art Direction

Harold H. MacArthur, Jack Otterson

Set Decoration

Russell A. Gausman

Costume Design

Vera West

Makeup Artist

Jack Pierce

Lon Chaney Jr.
Lon Chaney Jr.Dan McCormick
Lionel Atwill
Lionel AtwillDr. Paul Rigas
Anne Nagel
Anne NagelJune Lawrence
Frank Albertson
Frank AlbertsonMark Adams
Samuel S. Hinds
Samuel S. HindsDr. John Lawrence
William B. Davidson
William B. DavidsonDistrict Attorney Ralph B. Stanley
Ben Taggart
Ben TaggartDetective Sergeant Regan
Constance Bergen
Constance BergenNurse
Ivan Miller
Ivan MillerDoctor
Chester Gan
Chester GanChinese Boy, Wong
George Meader
George MeaderDr. Bruno
Frank O'Connor
Frank O'ConnorDetective
John Dilson
John DilsonMedical Examiner
Byron Foulger
Byron FoulgerAlienist #2
Jessie Arnold
Jessie ArnoldMrs. Frank Davis (uncredited)
James Blaine
James BlaineCharlie, Prison Guard (uncredited)
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Gary BrecknerRadio Announcer (uncredited)
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Lowell DrewJury Foreman (uncredited)
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John EllisAssistant District Attorney (uncredited)
Douglas Evans
Douglas EvansPolice Radio Announcer (uncredited)
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Jack GardnerReporter (uncredited)
William Hall
William HallMike - Dynamo Operator (uncredited)
Russell Hicks
Russell HicksWarden Harris (uncredited)
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Wright KramerJudge (uncredited)
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Tom QuinnDetective (uncredited)
Bob Reeves
Bob ReevesPrison Guard (uncredited)
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Mel RuickDefense Attorney (uncredited)
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Francis SaylesFrank Davis (uncredited)
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Paul ScottPrison Chaplain (uncredited)
David Sharpe
David SharpeHay Wagon Passenger (uncredited)
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Victor ZimmermanDynamo Operator #2 (uncredited)
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CorkyCorky the Dog (uncredited)