'Smilin' Jack' Martin

Tom Brown

Acting

Janet Thompson

Marjorie Lord

Acting

Trudy Muller, aka Fraulein von Teufel

Rose Hobart

Acting

Captain Wing

Keye Luke

Acting

Tommy Thompson

Edgar Barrier

Acting

Mah Ling / Han Po, his double

Cyril Delevanti

Acting

Wu Tan

Philip Ahn

Acting

Kageyama [Chs. 1-5, 12-13]

Turhan Bey

Acting

General Kai Ling [Chs. 1-5, 13]

Sidney Toler

Acting

Kushimi, infiltrator [Chs. 1-3, 12-13]

Jay Novello

Acting

Henchman Hito [Chs 1, 4, 12-13]

Rico De Montez

Acting

The Lo-San [Chs. 2-3, 12-13]

Nigel De Brulier

Acting

Hon. George Hill [Chs. 8-12]

Edward Keane

Acting

Secretary of Internal Affairs [Chs. 8-12]

William Forrest

Acting

Captain Yoshido [Chs. 1-3]

Jack Gardner

Acting

Shuma, pilot [Chs. 1-3]

Terry Grey

Acting

Capt. Hardigan [Chs. 5-6]

Stanley Blystone

Acting

Sir Cedric [Chs. 5-7]

Herbert Heyes

Acting

Commissioner Robert George Hardy [Chs. 5-7]

James Craven

Acting

Sanson, phoney waiter [Chs. 6-7]

Alex Havier

Acting

Herr Bauer [Chs. 6-7]

Paul Bryar

Acting

Frau Bauer [Chs. 6-7]

Norma Drury

Acting

Second German Woman Spy [Chs. 6-7]

Grace Cunard

Acting

John O. Blenker [Chs. 9-11]

David Hoffman

Acting

Freighter Captain [Chs. 7-8]

Edward Peil Sr.

Acting

Freighter Mate [Chs. 7-8]

Wheeler Oakman

Acting

Schlesser, device expert [Chs. 10-11]

Frederick Giermann

Acting

Shimoto, device operator [Chs. 10-11]

Bert Freeman

Acting

Honolulu Detective-in-charge [Chs. 10-12]

Harry Strang

Acting