On screen
Cast
17 credited performers
Artwork unavailable
Glen Gordon
Dr. Fu Manchu
Lester Matthews
Sir Denis Nayland Smith
Laurette Luez
Karamaneh
Clark Howat
Dr. John Petrie
Carla Balenda
Betty Leonard
John George
Kolb
John Carradine
Character not listed
Steven Geray
Otto Helgaard
Cedric Hardwicke
Character not listed
Victor Sen Yung
Broadcaster (uncredited)
Leonard Strong
Professor Hugh Yan
Keye Luke
Lum Sen
Morris Ankrum
Professor Rutledge
Keith Richards
Loder (uncredited)
Peter Mamakos
Carsten
Hugh Sanders
Capt. Warren
Suzanne Ridgway
Saloon Girl (uncredited)