GenreAction, Adventure, Drama SequelThe Vigilante ProducerSam Katzman CountryUnited States
WriterLewis Clay, Royal K. Cole, Arthur Hoerl, George H. Plympton, Leslie Swabacker Release dateFebruary 6, 1947 (1947-02-06) (U.S.) CastJohn Hart, Rosemary LaPlanche, Charles Middleton, Pierre Watkin Similar moviesSam Katzman produced Jack Armstrong and The Sea Hound
1 10 jack armstrong all american boy the adventures of the sunken reef
Jack Armstrong (1947) is a Columbia film serial, based on the radio adventure series Jack Armstrong, the All-American Boy.
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.
John Hart as Jack Armstrong
Rosemary LaPlanche as Betty Fairfield, niece of Jim Fairfield
Claire James as Princess Alura, leader of the native tribe on the island
Joe Brown, Jr. as Billy Fairfield, nephew of Jim Fairfield
Pierre Watkin as Uncle Jim Fairfield, owner of the aviation company
Wheeler Oakman as Professor Hobart Zorn, one of Grood's henchmen
Jack Ingram as Blair, Grood's "Spear-point Heavy" (chief henchman)
Eddie Parker as Slade, one of Grood's henchmen
Hugh Prosser as Vic Hardy, scientist kidnapped from the Fairfield aviation company
Charles Middleton as Jason Grood, a mad scientist and the main antagonist (despite Middleton not being billed in the credits.)