- Chester Gan - Chinese Boy, Wong
- George Meader - Dr. Bruno
- Frank O'Connor - Detective
- John Dilson - Medical Examiner
- Byron Foulger - Alienist #2
- Jessie Arnold - Mrs. Frank Davis (uncredited)
- James Blaine - Charlie, Prison Guard (uncredited)
- Gary Breckner - Radio Announcer (uncredited)
- Lowell Drew - Jury Foreman (uncredited)
- John Ellis - Assistant District Attorney (uncredited)
- Douglas Evans - Police Radio Announcer (uncredited)
- Jack Gardner - Reporter (uncredited)
- William Hall - Mike - Dynamo Operator (uncredited)
- Russell Hicks - Warden Harris (uncredited)
- Wright Kramer - Judge (uncredited)
- Tom Quinn - Detective (uncredited)
- Bob Reeves - Prison Guard (uncredited)
- Mel Ruick - Defense Attorney (uncredited)
- Francis Sayles - Frank Davis (uncredited)
- Paul Scott - Prison Chaplain (uncredited)
- David Sharpe - Hay Wagon Passenger (uncredited)
- Victor Zimmerman - Dynamo Operator #2 (uncredited)
- Corky - Corky the Dog (uncredited)
- George Waggner
- George Waggner
- Harry Essex
- Charles Henderson
- Charles Previn
- Bernard B. Brown
- Hans J. Salter
- Hans J. Salter
Lon Chaney Jr. interpreta a Dan McCormick en la película.
Lionel Atwill hace el papel de Dr. Paul Rigas.
Anne Nagel interpreta a June Lawrence en la película.
Frank Albertson hace el papel de Mark Adams.
Samuel S. Hinds interpreta a Dr. John Lawrence en la película.
William B. Davidson hace el papel de District Attorney Ralph B. Stanley.
Ben Taggart interpreta a Detective Sergeant Regan en la película.
Constance Bergen interpreta a Nurse en la película.
Ivan Miller interpreta a Doctor en la película.
Chester Gan interpreta a Chinese Boy, Wong en la película.
George Meader interpreta a Dr. Bruno en la película.
Frank O'Connor interpreta a Detective en la película.
John Dilson hace el papel de Medical Examiner.
Byron Foulger hace el papel de Alienist #2.
Jessie Arnold interpreta a Mrs. Frank Davis (uncredited) en la película.
James Blaine interpreta a Charlie, Prison Guard (uncredited) en la película.
Gary Breckner hace el papel de Radio Announcer (uncredited).
Lowell Drew interpreta a Jury Foreman (uncredited) en la película.
John Ellis interpreta a Assistant District Attorney (uncredited) en la película.
Douglas Evans hace el papel de Police Radio Announcer (uncredited).
Jack Gardner interpreta a Reporter (uncredited) en la película.
William Hall hace el papel de Mike - Dynamo Operator (uncredited).
Russell Hicks interpreta a Warden Harris (uncredited) en la película.
Wright Kramer hace el papel de Judge (uncredited).
Tom Quinn hace el papel de Detective (uncredited).
Bob Reeves interpreta a Prison Guard (uncredited) en la película.
Mel Ruick interpreta a Defense Attorney (uncredited) en la película.
Francis Sayles interpreta a Frank Davis (uncredited) en la película.
Paul Scott interpreta a Prison Chaplain (uncredited) en la película.
David Sharpe hace el papel de Hay Wagon Passenger (uncredited).
Victor Zimmerman interpreta a Dynamo Operator #2 (uncredited) en la película.
Corky hace el papel de Corky the Dog (uncredited).
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