"From Newspaper and Radio to the SCREEN...comes the Greatest OF ALL ADVENTURE THRILLS!"
A movie serial in 12 chapters: The famous comic strip character is on a mission to protect a secret tunnel passage between China and India.
'Smilin' Jack' Martin

Janet Thompson

Trudy Muller, aka Fraulein von Teufel

Captain Wing

Tommy Thompson

Mah Ling / Han Po, his double

Wu Tan

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

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

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

Henchman Hito [Chs 1, 4, 12-13]
The Lo-San [Chs. 2-3, 12-13]

Hon. George Hill [Chs. 8-12]

Secretary of Internal Affairs [Chs. 8-12]

Captain Yoshido [Chs. 1-3]
Shuma, pilot [Chs. 1-3]
Capt. Hardigan [Chs. 5-6]

Sir Cedric [Chs. 5-7]

Commissioner Robert George Hardy [Chs. 5-7]

Sanson, phoney waiter [Chs. 6-7]

Herr Bauer [Chs. 6-7]

Frau Bauer [Chs. 6-7]

Second German Woman Spy [Chs. 6-7]

John O. Blenker [Chs. 9-11]

Freighter Captain [Chs. 7-8]

Freighter Mate [Chs. 7-8]

Schlesser, device expert [Chs. 10-11]
Shimoto, device operator [Chs. 10-11]
Honolulu Detective-in-charge [Chs. 10-12]
