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]

Jack Gardner

Captain Yoshido [Chs. 1-3]

Lewis D. Collins

Ray Taylor