Even today with Siegfried and Roy and their glitzy Vegas style wild animal taming act, the guy whose name is forever associated as the best in that profession is still Clyde Beatty. As an actor however Clyde was a great lion tamer. Still this feature version of the Mascot serial The Lost Jungle does give Beatty's legion of fans an opportunity to see him work the big cats.
Like Sonja Henie, Beatty made his money and reputation in his field and just saw movies as a way of gaining publicity for his circus and he owned and was the feature attraction of his own circus, in the same way that Henie just used her 20th Century Fox films to publicize her ice show. Of course there's light years difference between working for 20th Century Fox and Mascot Pictures.
The condensed feature film has a whole lot of things that any serial would have, lost island, lost treasure on same, a dirigible with Beatty and sidekick Syd Saylor on board, a shipwreck with Beatty's girl friend Cecilia Parker on it. Plus lots of encounters with lions and tigers who are on this mysterious lost island of Kumar in the Indian ocean which has animals native to both Africa and Asia. It even has a young Mickey Rooney at the beginning of the film as a kid going to Beatty's circus.
It's not much of a film, but it is a chance to see Clyde Beatty who was the very best at what he did.