Boris Karloff
James Lee Wong
Acting
Grant Withers
Police Capt. Sam Street
Acting
Dorothy Tree
Valerie Edwards
Acting
Craig Reynolds
Peter Harrison
Acting
Ivan Lebedeff
Michael Strogonoff
Acting
Holmes Herbert
Prof. Ed Janney
Acting
Morgan Wallace
Brandon Edwards
Acting
Lotus Long
Drina
Acting
Chester Gan
Sing
Acting
Hooper Atchley
Carslake
Acting
Bruce Wong
Asian Man
Acting
Jack Kennedy
Police Guard
Acting
Lee Tung Foo
Willie
Acting
Wilbur Mack
Ballstics Expert
Acting
Dick Morehead
Police Detective
Acting
Joe Devlin
Police Lt. George Devlin
Acting
I. Stanford Jolley
Charades-Player
Acting