Sidney Toler
Charlie Chan
Victor Sen Yung
Jimmy Chan
Cesar Romero
Fred Rhadini
Douglas Fowley
Peter Lewis
Pauline Moore
Eve Cairo
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)
Wally Vernon
Elmer