A 14-episode serial in which Mala, a Polynesian in the employ of U.S. Intelligence investigates sabotage on Clipper Island. A gang of spies causes the eruption of a volcano, for which our hero is blamed. He convinces the local Princess Melani of his innocence and helps her ward off a takeover by rival high priest Porotu.
| Actor | Role |
|---|---|
 MalaAgent Ray Mala | Agent Ray Mala |
 RexRex, the Wonder Horse | Rex, the Wonder Horse |
 Mamo ClarkPrincess Melani | Princess Melani |
 Herbert RawlinsonGrant Jackson | Grant Jackson |
 William NewellHank McGlaurie | Hank McGlaurie |
 John WardAnthony Tupper | Anthony Tupper |
 John DilsonE.G. Ellsworth | E.G. Ellsworth |
 Selmer JacksonMr. Canfield | Mr. Canfield |
 John PicorriPorotu | Porotu |
 George ChesebroDraker, Island Operations Chief | Draker, Island Operations Chief |
 Bob KortmanGang Yacht Capt. Wilson | Gang Yacht Capt. Wilson |
 George ClevelandGoebel, Gang Scientist | Goebel, Gang Scientist |
 Lloyd WhitlockLamar, Headquarters Gang Member [Chs. 1-6] | Lamar, Headquarters Gang Member [Chs. 1-6] |
| TTiny RoebuckEppa the Wrestler | Eppa the Wrestler |
| RRoscoe GeraldPrice - Cave Thug in Visor (uncredited) | Price - Cave Thug in Visor (uncredited) |