 Grant WithersOfficer Pat O'Hara | Officer Pat O'Hara |
 Adrian MorrisOfficer Sam Maloney | Officer Sam Maloney |
 Kay HughesMolly Selkirk | Molly Selkirk |
 Mickey RentschlerPinky Adams | Pinky Adams |
| SSilver WolfIrish | Irish |
| GGordon HartW.H. Harrison | W.H. Harrison |
 Frank LackteenMr. Tahata, alias Warner the Great | Mr. Tahata, alias Warner the Great |
 C. Montague ShawMr. Wellington | Mr. Wellington |
 Harry DavenportJohn P. Adams, inventor | John P. Adams, inventor |
 Wheeler OakmanStevens, gang chemist | Stevens, gang chemist |
 Max Hoffman Jr.Harry Selkirk | Harry Selkirk |
 Jack MulhallDesk Sergeant | Desk Sergeant |
 Earl DwireJeremiah Crockett | Jeremiah Crockett |
| LLeonard LordFranklin, the real Tahata | Franklin, the real Tahata |
 Dick BotillerHenchman Zutta | Henchman Zutta |
| LLouis VokaliHenchman / Off-screen Trainer of Silver Wolf | Henchman / Off-screen Trainer of Silver Wolf |
 Ernie AdamsHobo | Hobo |
 Hooper AtchleyCasey | Casey |
 Stanley BlystonePlant Foreman | Plant Foreman |
 Richard CramerCharlie | Charlie |
| JJack GardnerIntern | Intern |
 Pat GleasonBlake | Blake |
 William Gould1925 Police Chief | 1925 Police Chief |
| AAl HermanHobo Finding Suitcase | Hobo Finding Suitcase |
 Carey LoftinPollard Henchman | Pollard Henchman |
 Tom LondonEddie Lewis | Eddie Lewis |
 Monte MontagueJames Pollard | James Pollard |
 Charles MurphyHobo-Henchman | Hobo-Henchman |
 Eddie ParkerPolice Dispatcher / Steel Mill Worker | Police Dispatcher / Steel Mill Worker |
| HHenry RoquemoreThe Chef | The Chef |
