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Harold Lloyd as Harold Bledsoe |
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Barbara Kent as Billie Lee |
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Noah Young as Patrick Clancy SFPD |
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Charles Middleton as John Thorne / The Dragon |
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Will Walling as Captain Walton, SFPD 3rd Div. |
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Grady Sutton as Man at Party (silent version) (scenes deleted) |
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Brooks Benedict as Handcuffed Prisoner at Police Station (uncredited) |
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Eddy Chandler as Cop (uncredited) |
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Rae Daggett as Woman Sitting in Police Station (uncredited) |
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Douglas Haig as Buddy Lee (uncredited) |
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Edgar Kennedy as SFPD Desk Sergeant (uncredited) |
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Tetsu Komai as Florist Henchman (uncredited) |
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James B. Leong as Florist Henchman / High Priest (uncredited) |
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James Pier Mason as Barry Steele / Dick the Dude (uncredited) |
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Nelson McDowell as 1st Train Passenger (uncredited) |
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James Wang as Dr. Chang Gow (uncredited) |
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Blue Washington as Thorne's Henchman (uncredited) |
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Leo Willis as Cop (uncredited) |
| Writing | Felix Adler | Story |
| Directing | Malcolm St. Clair | Director |
| Directing | Clyde Bruckman | Director |
| Writing | Paul Gerard Smith | Dialogue |
| Directing | Gaylord Lloyd | Assistant Director |
| Writing | Clyde Bruckman | Story |
| Art | Liell K. Vedder | Art Direction |
| Sound | George D. Ellis | Sound |
| Production | James H. Anderson | Production Assistant |
| Production | Harold Lloyd | Producer |
| Editing | Carl Himm | Editor |
| Production | John L. Murphy | Production Manager |
| Sound | C. Bakaleinikoff | Music Arranger |
| Writing | Harold Lloyd | Writer |
| Sound | Lodge Cunningham | Sound |
| Editing | Bernard W. Burton | Editor |
| Camera | Henry N. Kohler | Director of Photography |
| Camera | Walter Lundin | Director of Photography |
