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Edmund Lowe as Philo Vance |
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Virginia Bruce as Zalia Graem |
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Benita Hume as Nurse Gladys Beeton |
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Douglas Walton as Floyd Garden |
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Nat Pendleton as Sergeant Ernest Heath |
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Gene Lockhart as Edgar Lowe Hammle |
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H.B. Warner as Major Fenwicke-Ralston |
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Kent Smith as Woode Swift |
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Grant Mitchell as District Attorney Markham |
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Frieda Inescort as Mrs. Madge Fenwicke-Ralston |
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Henry B. Walthall as Dr. Garden |
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Jessie Ralph as Mrs. Hammle |
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Charles Trowbridge as Inspector Colby |
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Etienne Girardot as Dr. Doremus |
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William Austin as Sneed, Hammle's Butler (Uncredited) |
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Don Brodie as Messenger (Uncredited) |
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Olaf Hytten as Vance's Butler (Uncredited) |
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Rosalind Ivan as Mrs. Jepson (Uncredited) |
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Fred Kelsey as Heath's Assistant (Uncredited) |
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Wilbur Mack as Man Yelling at Race Track (Uncredited) |
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Lee Phelps as Bus Driver (Uncredited) |
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Alexander Pollard as Waiter at Race Track (Uncredited) |
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Jack Roper as Servant Eating Caviar (Uncredited) |
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Matty Roubert as Newsboy (Uncredited) |
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Dorothy Vernon as Woman Running for Bus (Uncredited) |
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Duke York as Traffic Cop (Uncredited) |
| Writing | S.S. Van Dine | Novel |
| Directing | Edwin L. Marin | Director |
| Writing | Bertram Millhauser | Screenplay |
| Directing | Lesley Selander | Assistant Director |
| Camera | Charles G. Clarke | Director of Photography |
| Sound | William Axt | Original Music Composer |
| Production | Ned Marin | Producer |
| Art | Cedric Gibbons | Art Direction |
| Production | Lucien Hubbard | Producer |
| Editing | Ben Lewis | Editor |
| Sound | Jack Virgil | Orchestrator |
| Sound | Paul Marquardt | Orchestrator |
| Sound | Douglas Shearer | Sound Director |
| Art | Edwin B. Willis | Art Direction |
| Art | Joseph C. Wright | Art Direction |
| Costume & Make-Up | Dolly Tree | Costume Design |
