The Girl Detective

Ruth Roland

Ruth, The Girl Detective

Marin Sais

Bertha, the Girl Detective

Cleo Ridgely

Kate Rumson / Mrs. Rodger Hastings / Olga / Queenie / Molly Moran / Jean, The Girl Detective

Edward Clisbee

Chief of Police Harding

Arthur Shirley

John Talcott

William H. West

Rumson / Strumfsky / Isaacson / Fairfax / Marsden / Rankin / Deacon / Merriman / Craven / Kerrigan / Brandon / Dr. Barry