Ruth Roland

Character: Ruth, The Girl Detective

Marin Sais

Character: Bertha, the Girl Detective

Cleo Ridgely

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

Edward Clisbee

Character: Chief of Police Harding

Arthur Shirley

Character: John Talcott

William H. West

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

Paul Hurst

Character: Blair / Thompson / Michaels / Snake Henely / Mike Donegal / Bat Dorgan / Kelly / Dalton / Blake

Ollie Kirby

Character: Mrs. Churchill / Emily Wharton / Mary Kerrigan / Marie / Mrs. Winslow / Mabel Keene / Mrs. Cluett

Thomas G. Lingham

Character: George Warren / Machson / Doran / Rat Hogan / Ripert Bladeau / Jarvis / Breslow / Jeffries / Rillando / Dr. Keene

Frank Jonasson

Character: McGregor / Buck Donegal / Fourteen-Carat Tommy / Henri Bladeau / Turner / Denton / Jordan / Scotty Weed

R. Henry Grey

Character: Rodger Hastings / Harry Warrington

Thomas Galligan

Character: Peters / Thompson

Alice Meyer

Character: Marie

James W. Horne

Character: Blaney

J. Schneider

Character: Chad

Evelyn Wayne

Character: Ray, Brandon's Daughter