Fourth release in 'The Mystery of Dr. Fu Manchu' series. Nayland Smith saves the life of Graham Guthrie, the British Resident in Bhutan, while on a visit to London from a plot by Dr. Fu-Manchu.

Third release in 'The Mystery of Dr. Fu Manchu' series, where the police has to investigate the clue of the pigtail wig.

Second release in 'The Mystery of Dr. Fu Manchu' series. Plans for an aerial torpedo are stolen from its inventor Frank Norris West, Nayland Smith tries to retrieve them but is defeated by Fu-Manchu.