 Ruth RolandRuth, The Girl Detective | Ruth, The Girl Detective |
 Marin SaisBertha, the Girl Detective | Bertha, the Girl Detective |
 Cleo RidgelyKate Rumson / Mrs. Rodger Hastings / Olga / Queenie / Molly Moran / Jean, The Girl Detective | Kate Rumson / Mrs. Rodger Hastings / Olga / Queenie / Molly Moran / Jean, The Girl Detective |
 Edward ClisbeeChief of Police Harding | Chief of Police Harding |
 Arthur ShirleyJohn Talcott | John Talcott |
| WWilliam H. WestRumson / Strumfsky / Isaacson / Fairfax / Marsden / Rankin / Deacon / Merriman / Craven / Kerrigan / Brandon / Dr. Barry | Rumson / Strumfsky / Isaacson / Fairfax / Marsden / Rankin / Deacon / Merriman / Craven / Kerrigan / Brandon / Dr. Barry |
 Paul HurstBlair / Thompson / Michaels / Snake Henely / Mike Donegal / Bat Dorgan / Kelly / Dalton / Blake | Blair / Thompson / Michaels / Snake Henely / Mike Donegal / Bat Dorgan / Kelly / Dalton / Blake |
 Ollie KirbyMrs. Churchill / Emily Wharton / Mary Kerrigan / Marie / Mrs. Winslow / Mabel Keene / Mrs. Cluett | Mrs. Churchill / Emily Wharton / Mary Kerrigan / Marie / Mrs. Winslow / Mabel Keene / Mrs. Cluett |
 Thomas G. LinghamGeorge Warren / Machson / Doran / Rat Hogan / Ripert Bladeau / Jarvis / Breslow / Jeffries / Rillando / Dr. Keene | George Warren / Machson / Doran / Rat Hogan / Ripert Bladeau / Jarvis / Breslow / Jeffries / Rillando / Dr. Keene |
| FFrank JonassonMcGregor / Buck Donegal / Fourteen-Carat Tommy / Henri Bladeau / Turner / Denton / Jordan / Scotty Weed | McGregor / Buck Donegal / Fourteen-Carat Tommy / Henri Bladeau / Turner / Denton / Jordan / Scotty Weed |
 R. Henry GreyRodger Hastings / Harry Warrington | Rodger Hastings / Harry Warrington |
| TThomas GalliganPeters / Thompson | Peters / Thompson |
| AAlice MeyerMarie | Marie |
 James W. HorneBlaney | Blaney |
| JJ. SchneiderChad | Chad |
| EEvelyn WayneRay, Brandon's Daughter | Ray, Brandon's Daughter |
