Tarzan and the Forbidden City

A young man named Brian Gregory has disappeared in Africa, looking for the fabled Father of Diamonds; his father and sister want to go rescue him, and they can only enlist Tarzan''s help because they know Captain Paul D`Arnot. By chance, Tarzan and Brian are lookalike, thus making some vile scoundrels to think Tarzan is Brian. They are also heading out after the big old diamond. The Forbidden city...