波利斯·卡洛夫
Boris Karloff
饰:James Lee Wong
格兰特·威瑟斯
GranvilleG.Withers
饰:Police Captain Sam Street
多萝西·特里
Dorothy Tree
饰:Valerie Edwards
Craig Reynolds
饰:Peter Harrison
Ivan Lebedeff
饰:Michael Strogonoff
福尔摩斯·赫伯特
Holmes Herbert
饰:Prof. Ed Janney
Morgan Wallace
饰:Brandon Edwards
Lotus Long
饰:Drina, the Maid
Chester Gan
饰:Sing, the Butler
Hooper Atchley
饰:Carslake
Bruce Wong
饰:Asian Man
Jack Kennedy
饰:Policeman
Joe Devlin
饰:George, the Detective
李从福
Lee Tung Foo
饰:Willie (as Lee Tong Foo)
Wilbur Mack
饰:Ballistics Expert
Dick Morehead
Dick Morehead
饰:Police Detective
I·斯坦福·乔利
I. Stanford Jolley
饰:Charades Player (uncredited)