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.
| Actor | Role |
|---|---|
| HH. Agar LyonsDr. Fu Manchu | Dr. Fu Manchu |
 Fred PaulNayland Smith | Nayland Smith |
 Joan ClarksonKaramaneh | Karamaneh |
| HHumberston WrightDr. Petrie | Dr. Petrie |
 Frank WilsonInspector Weymouth | Inspector Weymouth |