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