Jack Armstrong (serial)

Jack Armstrong (1947) is a Columbia film serial, based on the radio adventure series Jack Armstrong, the All-American Boy.

Plot
Vic Hardy, a scientist working for Jim Fairfield's aviation company, is kidnapped by Jason Grood's gang after discovering radiation emitting from their secret island base. Grood intends to conquer the world and forces Hardy to assist him.

Fairfield, along with his niece and nephew and, most importantly, the hero of the title, attempt to rescue Hardy and stop Grood's plans. They are assisted by the native tribe living on the island, led by Princess Alura.

Cast

 * John Hart as Jack Armstrong
 * Rosemary LaPlanche as Betty Fairfield
 * Claire James as Princess Alura [Chs. 3-6,9-11, 15]
 * Joe Brown, Jr. as Billy Fairfield (as Joe Brown)
 * Pierre Watkin as Uncle Jim Fairfield
 * Wheeler Oakman as Prof. Hobart Zorn
 * Jack Ingram as Henchman Blair
 * Eddie Parker as Henchman Slade
 * Hugh Prosser as Vic Hardy

Chapter titles
Source:
 * 1) Mystery of the Cosmic Ray
 * 2) The Far World
 * 3) Island of Deception
 * 4) Into the Chasm
 * 5) The Space Ship
 * 6) Tunnels of Treachery
 * 7) Cavern of Chance
 * 8) The Secret Room
 * 9) Human Targets
 * 10) Battle of the Warriors
 * 11) Cosmic Annihilator
 * 12) The Grotto of Greed
 * 13) Wheels of Fate
 * 14) Journey into Space
 * 15) Retribution