Tom Brown
'Smilin' Jack' Martin
Marjorie Lord
Janet Thompson
Rose Hobart
Trudy Muller, aka Fraulein von Teufel
Keye Luke
Captain Wing
Edgar Barrier
Tommy Thompson
Cyril Delevanti
Mah Ling / Han Po, his double
Philip Ahn
Wu Tan
Turhan Bey
Kageyama [Chs. 1-5, 12-13]
Sidney Toler
General Kai Ling [Chs. 1-5, 13]
Jay Novello
Kushimi, infiltrator [Chs. 1-3, 12-13]
Rico De Montez
Henchman Hito [Chs 1, 4, 12-13]
Nigel De Brulier
The Lo-San [Chs. 2-3, 12-13]
Edward Keane
Hon. George Hill [Chs. 8-12]
William Forrest
Secretary of Internal Affairs [Chs. 8-12]
