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Boris Karloff as Dr. Charles Gaudet |
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Nedda Harrigan as Madame Lucien |
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James Stephenson as Col. Armand Lucien |
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Adia Kuznetzoff as Pierre |
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Rolla Gourvitch as Collette |
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Will Stanton as Bobo |
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Edward Keane as Dr. Duval |
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Robert Warwick as Demonpre |
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Pedro de Cordoba as Marcal |
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Tom Wilson as Emil |
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John Harmon as Andre |
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Richard Bond as Georges |
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Earl Gunn as Leon |
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Sidney Bracey as Soupy |
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George Lloyd as Dogface |
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Charles Richman as Governor Beaufort |
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Stuart Holmes as Gustav LeBrun |
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Leonard Mudie as Advocate General |
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Egon Brecher as Debriac |
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Frank Reicher as President of Assize Court |
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James Blaine as Guard |
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Dick Botiller as Pilot of Escape Boat |
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Al Bridge as Captain of the Guards |
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Nat Carr as Court Clerk |
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Glen Cavender as Gendarme on Train |
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Davison Clark as Captain of Gendarmes |
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Neal Clisby as Jules |
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Harry Cording as Guard Accepting Bribe |
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Gino Corrado as Man Escaping Gendarmes with Debriac |
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Earl Dwire as Priest |
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Eddie Foster as Supply Clerk |
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Galan Galt as Guard |
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Sol Gorss as Guard Escorting Gaudet After Operation |
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Frank Hagney as Guard |
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John Hamilton as Captain of Second Convict Ship |
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Ben Hendricks Jr. as François - Sergeant of the Guards |
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Stanley King as Guard |
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Vera Lewis as Gaudet's Housekeeper |
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Billy McClain as Governor's Servant |
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Henry Otho as Guard Handcuffing Pierre |
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Paul Panzer as Jury Foreman |
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Alonzo Price as Capt. Edvard Fearreau of the First Convict Ship |
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Dick Rich as Guard Drugged by Gaudet |
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Cliff Saum as Uniformed Gendarme |
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Francis Sayles as Boatman Taking Madame Lucien to Mainland |
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Earl Smith as Daniel - Madame Lucien's Servant |
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Walter Soderling as Wagon Driver |
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Elliott Sullivan as Gate Guard |
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Don Turner as Guard Escorting Gaudet After Operation |
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Douglas Williams as Guard |
| Directing | William Clemens | Director |
| Writing | Kenneth Gamet | Screenplay |
| Writing | Don Ryan | Screenplay |
| Writing | Anthony Coldeway | Story |
| Writing | Raymond L. Schrock | Story |
| Production | Bryan Foy | Associate Producer |
| Sound | Howard Jackson | Original Music Composer |
| Camera | George Barnes | Director of Photography |
| Editing | Frank Magee | Editor |
| Art | Max Parker | Art Direction |
| Costume & Make-Up | Ray Romero | Makeup Artist |
| Directing | Arthur Lueker | Assistant Director |
| Sound | Robert B. Lee | Sound |
| Crew | Sol Gorss | Stunts |
| Crew | Don Turner | Stunts |