 Harold LloydHarold Bledsoe | Harold Bledsoe |
 Barbara KentBillie Lee | Billie Lee |
 Noah YoungPatrick Clancy SFPD | Patrick Clancy SFPD |
 Charles MiddletonJohn Thorne / The Dragon | John Thorne / The Dragon |
 Will WallingCaptain Walton, SFPD 3rd Div. | Captain Walton, SFPD 3rd Div. |
 Grady SuttonMan at Party (silent version) (scenes deleted) | Man at Party (silent version) (scenes deleted) |
 Brooks BenedictHandcuffed Prisoner at Police Station (uncredited) | Handcuffed Prisoner at Police Station (uncredited) |
 Eddy ChandlerCop (uncredited) | Cop (uncredited) |
| RRae DaggettWoman Sitting in Police Station (uncredited) | Woman Sitting in Police Station (uncredited) |
| DDouglas HaigBuddy Lee (uncredited) | Buddy Lee (uncredited) |
 Edgar KennedySFPD Desk Sergeant (uncredited) | SFPD Desk Sergeant (uncredited) |
 Tetsu KomaiFlorist Henchman (uncredited) | Florist Henchman (uncredited) |
 James B. LeongFlorist Henchman / High Priest (uncredited) | Florist Henchman / High Priest (uncredited) |
 James Pier MasonBarry Steele / Dick the Dude (uncredited) | Barry Steele / Dick the Dude (uncredited) |
 Nelson McDowell1st Train Passenger (uncredited) | 1st Train Passenger (uncredited) |
| JJames WangDr. Chang Gow (uncredited) | Dr. Chang Gow (uncredited) |
 Blue WashingtonThorne's Henchman (uncredited) | Thorne's Henchman (uncredited) |
 Leo WillisCop (uncredited) | Cop (uncredited) |
