
"A THUNDERBOLT DRAMA OF FEDERAL MEN IN THE WAR ON CRIME!"
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.
Ted 'Rip-Roaring' Riley

Ann Baker

Major Gray

Sparko - Henchman

Professor Baker
Franko - Henchman

Bruno - Henchman

Chief Martin

Lun - Houseboy