There's a TARZAN curse when you look into the actors: Johnny Weismuller was golfing in Cuba during the Castro takeover, and decades later ended up doing his Tarzan call throughout the lonely corridors of an old folk's home; Lex Barker died middle-aged before marrying a younger woman; Mike Henry was bitten by a chimp and suffered from monkey fever; and far worst of all, Ron Ely hosted Name That Tune with Kathie Lee Gifford...
At least Gordon Scott turned out okay, but his replacement in actor/stuntman Jock Mahoney... after getting through TARZAN GOES TO INDIA without trouble... dared to swim across a giant, extremely polluted Thailand river and caught amoebic dysentery, never gaining back complete strength for future stunt or acting roles...
Which supposedly explains why he looks so frail here... but even in INDIA he was the skinniest Tarzan ever, appearing more like an in-shape long-distance-runner than the kind of bodybuilder type the part's known, and, given the character's legendary strength, most often calls for...
But he makes a decent vine-swinger... and his initial CHALLENGES happen in the course of eight-minutes, leaving the rest of the picture for villain Woody Strode, evil uncle of a child about to rule over the Asian country, trying to get his own young son to replace him...
Taking place within the vibrant yet antique oriental cities and monasteries, providing terrific visuals between random jungle romps, Tarzan could have used more action and less of the baby elephant...
But he does finally have an effective sidekick that's not some vulnerable kid or a goofy adult forcing comic relief... but a swift and agile local (Jimmy Jamal) who unfortunately dies too soon...
Which is normal since anything with enough potential peters out quickly enough to where the audience forgets the villain's motivation, or Tarzan's motivation in stopping him: a shame being Jock's last romp while Woody Strode (though his voice was dubbed) definitely looks the part of a worthwhile adversary...
But most of the time they seem in two different movies... until squaring-off in an adjoined-competition/challenge that takes far too long to happen, and ultimately aren't very... challenging... except for the incredible final sword-fight over a roped-covered flame-pit that (with the casting of Strode) could even put SPARTACUS to shame.