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Chester Morris as Detective Anderson |
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Chance Ward as Police lieutenant |
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Una Merkel as Dale Van Gorder |
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Richard Tucker as Mr. Bell |
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Wilson Benge as The Butler |
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DeWitt Jennings as Police Captain |
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Sidney D'Albrook as Police Sergeant |
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S.E. Jennings as Man in Black Mask |
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Grayce Hampton as Miss Cornelia van Gorder |
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Maude Eburne as Lizzie Allen |
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Spencer Charters as The Caretaker |
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William Bakewell as Brook |
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Gustav von Seyffertitz as Dr. Venrees |
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Hugh Huntley as Richard Fleming |
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Charles Dow Clark as Detective Jones |
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Ben Bard as The Unknown |
| Directing | Roland West | Director |
| Editing | Hal C. Kern | Editor |
| Writing | Mary Roberts Rinehart | Theatre Play |
| Sound | Oscar Lagerstrom | Sound |
| Editing | James Smith | Editor |
| Art | Paul Crawley | Set Decoration |
| Costume & Make-Up | S.E. Jennings | Makeup Artist |
| Writing | Avery Hopwood | Theatre Play |
| Writing | Roland West | Writer |
| Production | Joseph M. Schenck | Producer |
| Camera | Ray June | Director of Photography |
| Camera | Robert H. Planck | Director of Photography |
| Production | Helen Hallett | Production Manager |
| Directing | Roger Heman Sr. | Assistant Director |
