Overview
G-Man Ted Riley is ordered to investigate happenings at Diamond Island, where a bogus Major Gray is reported engaged in manufacturing a new brand of secret gas for his own purposes. Riley blows up his motor boat just off the island and is picked up by Gray's men. On the island he discovers chemist Professor Baker (John Cowell) and his daughter, Anne, are held captive by Major Gray.
Cast
- Lloyd Hughes as Ted 'Rip-Roaring' Riley
- Marion Burns as Ann Baker
- Grant Withers as Major Gray
- Eddie Gribbon as Sparko - Henchman
- John Cowell as Professor Baker
- Paul Ellis as Franko - Henchman
- Kit Guard as Bruno - Henchman
- Wilfred Lucas as Chief Martin
- Joe Hirakawa as Lun - Houseboy