Victor Sen Yung
Jimmy Chan
Douglas Fowley
Peter Lewis
Donald MacBride
Deputy Police Chief J.J. Kilvaine
Douglass Dumbrille
Stewart Salsbury, alias Thomas Gregory
Trevor Bardette
Dr. Zodiac's Servant
Gerald Mohr
Dr. Zodiac (in disguise)
Billie Seward
Mrs. Bessie Sibley
6.2
