Pauline Hargrave
Robert Ward (as Robert Allen)
Prof. Hargrave
Dr. Bashan
Willie Dodge
Fang
Tim Sullivan - Aviator [Chs. 5-7]
Prof. Thompson [Chs. 9-12]
Haggins - Foreign Consul [Ch. 9]
American Consul [Ch. 1]
Capt. Drake [Chs. 2-3] (as Adolph Millar)
Foo Chow - Bashan's Henchman (as Jimmie Wong)
Airline Official (uncredited)
Chinese Man (uncredited)
New York Henchman (uncredited)
Woman Accomplice in Singapore (uncredited)
Bashan's Attendant (uncredited)
Fake Museum Watchman (uncredited)
Soldier at American Consulate (uncredited)
Guide-Henchman (uncredited)
Police Guard (uncredited)
Airport Inspector (uncredited)
Tyrone (uncredited)
American Tourist (uncredited)
Cop at Fire Scene (uncredited)
Henchman (uncredited)
Lee (uncredited)
Stewardess (uncredited)
