Gritty, violent (mostly suggestively), well-made and adult in tone (there is even an attempted rape, and hints of perversity in Betta St. John's character), but with a few too many slow spots. Gordon Scott is rock-solid (literally!) as Tarzan, and Jock Mahoney (the following Tarzan!) is a worthy antagonist; their climactic fight is exhausting. **1/2 out of 4.