Tarzan's Hidden Jungle marked the debut of Gordon Scott as Edgar Rice Burroughs legendary ape man of the African jungle. It was also the last Tarzan film done at RKO studios which was slowly going out of business and would in the next two years. It was the reason they did not invest this film with too many production values. It was nice that they actually used black people to portray natives in the film as producers did not on too many occasions for Johnny Weissmuller and Lex Barker Tarzan movies.
Gordon Scott was one of those Hollywood discovery stories you read about. A professional bodybuilder he was discovered pool side and brought to Hollywood and beat out a whole lot of other candidates for the Tarzan roles. He wasn't exactly Brando or Olivier with the dialog, but for someone who was making his screen debut with no other acting experience, Scott handled the dialog better than you would expect.
And he married the leading lady Vera Miles while still shooting the film. Miles plays the assistant to UN doctor Peter Van Eyck who gets tricked by some unscrupulous hunters, Jack Elam and Charles Fredericks, to take them along on his humanitarian mission.
Van Eyck's mission was to a native tribe who apparently were vegetarians because they did not believe in the killing of animals. As a result game flourished in their territory. As Tarzan is a friend of the animals as well, his mission was to stop the bad guys from harming his jungle friends.
Tarzan's Hidden Jungle is not a bad debut for Gordon Scott in the new role. In fact Scott was my particular favorite among the actors who played Tarzan.