Edward Clisbee

饰：Chief of Police Harding

William H. West

饰：Deacon - the Multimillionaire

Knute Rahm

饰：(Episode #4)

Anna Lingham

饰：(Episode #4)

John E. Brennan

饰：(Episode #6)

Ollie Kirby

饰：(Episode #16, 17),(as Ollie Kirkby)

露丝·罗兰德

Ruth Roland

饰：Ruth - The Girl Detective

Cleo Ridgely

饰：Jean - The Girl Detective

Marin Sais

饰：Bertha - The Girl Detective

保罗·赫斯特

Paul Hurst

饰：(Episode #1, 2, etc.)

R. Henry Grey

饰：The Girl Detective`s Assistant

詹姆斯·W. 霍恩

James W. Horne

饰：(Episode #1)

Thomas G. Lingham

饰：Jarvis - Head of the F.O.B.A.

Arthur Shirley

饰：John Talcott

Frank Jonasson

Frank Jonasson

饰：(Episode #10)

Arthur Shirley

Arthur Shirley

饰：John Talcott