Tom Brown
'Smilin' Jack' Martin
Acting
Marjorie Lord
Janet Thompson
Acting
Rose Hobart
Trudy Muller, aka Fraulein von Teufel
Acting
Keye Luke
Captain Wing
Acting
Edgar Barrier
Tommy Thompson
Acting
Cyril Delevanti
Mah Ling / Han Po, his double
Acting
Philip Ahn
Wu Tan
Acting
Turhan Bey
Kageyama [Chs. 1-5, 12-13]
Acting
Sidney Toler
General Kai Ling [Chs. 1-5, 13]
Acting
Jay Novello
Kushimi, infiltrator [Chs. 1-3, 12-13]
Acting
Rico De Montez
Henchman Hito [Chs 1, 4, 12-13]
Acting
Nigel De Brulier
The Lo-San [Chs. 2-3, 12-13]
Acting
Edward Keane
Hon. George Hill [Chs. 8-12]
Acting
William Forrest
Secretary of Internal Affairs [Chs. 8-12]
Acting
Jack Gardner
Captain Yoshido [Chs. 1-3]
Acting
Terry Grey
Shuma, pilot [Chs. 1-3]
Acting
Stanley Blystone
Capt. Hardigan [Chs. 5-6]
Acting
Herbert Heyes
Sir Cedric [Chs. 5-7]
Acting
James Craven
Commissioner Robert George Hardy [Chs. 5-7]
Acting
Alex Havier
Sanson, phoney waiter [Chs. 6-7]
Acting
Paul Bryar
Herr Bauer [Chs. 6-7]
Acting
Norma Drury
Frau Bauer [Chs. 6-7]
Acting
Grace Cunard
Second German Woman Spy [Chs. 6-7]
Acting
David Hoffman
John O. Blenker [Chs. 9-11]
Acting
Edward Peil Sr.
Freighter Captain [Chs. 7-8]
Acting
Wheeler Oakman
Freighter Mate [Chs. 7-8]
Acting
Frederick Giermann
Schlesser, device expert [Chs. 10-11]
Acting
Bert Freeman
Shimoto, device operator [Chs. 10-11]
Acting
Harry Strang
Honolulu Detective-in-charge [Chs. 10-12]
Acting