| Person | Type | Job | Role(s) |
|---|---|---|---|
 Allan Radar | Crew | Writing | Story |
Dwight Caldwell | Crew | Editing | Editor |
George Meehan | Crew | Camera | Director of Photography |
Jack A. Goodrich | Crew | Sound | Sound |
Mario Castelnuovo-Tedesco | Crew | Sound | Original Music Composer |
Rudolph C. Flothow | Crew | Production | Producer |
Wilfred H. Petitt | Crew | Writing | Writer |
 William Castle | Crew | Directing | Director, Writer |
Chris Beute | Crew | Directing | Assistant Director |
 Byron Foulger | Cast | Actor | Georgie (uncredited) |
 Charles Coleman | Cast | Actor | Sinclair's Butler (uncredited) |
Charles Marsh | Cast | Actor | Sinclair Executive (uncredited) |
 Clinton Rosemond | Cast | Actor | Train Porter (uncredited) |
 Douglas Wood | Cast | Actor | Paul Kitridge - Attorney (uncredited) |
 Egon Brecher | Cast | Actor | Dr. Rose (replaced by Frank Reicher) (uncredited) |
 Forbes Murray | Cast | Actor | Sinclair Executive (uncredited) |
 Frank J. Scannell | Cast | Actor | Druggist (uncredited) |
 Frank Reicher | Cast | Actor | Dr. Rose (uncredited) |
 Gigi Perreau | Cast | Actress | Bobbie (uncredited) |
 Harold Miller | Cast | Actor | Sinclair Executive (uncredited) |
 James Cardwell | Cast | Actor | Fred (Doc) Graham |
 John Hamilton | Cast | Actor | Doctor (uncredited) |
 Lynn Merrick | Cast | Actress | Joan Martin Sinclair |
 Martín Garralaga | Cast | Actor | Tony, Fruit Peddler (uncredited) |
 Minerva Urecal | Cast | Actress | Georgie's Wife (uncredited) |
Otto Forrest | Cast | The Whistler (uncredited) | |
 Rhys Williams | Cast | Actor | Ernie Sparrow |
 Richard Dix | Cast | Actor | John Sinclair / John Carter |
 Robert B. Williams | Cast | Actor | Pharmacist (uncredited) |
 Sam Ash | Cast | Actor | Gibson Motor Car Co. Executive (uncredited) |
 Stuart Holmes | Cast | Actor | Sinclair Executive (uncredited) |
 Tom Kennedy | Cast | Actor | Ferdinand / Hammerlock |
 Wilbur Mack | Cast | Actor | Sinclair Executive (uncredited) |
| Person | Type | Job | Role(s) |
