Tarzan and the Lost City of Opar

Two leopard men take the Professor to the forgotten city of Opar, where Queen La is hoping for a king. She refuses the Professor and has the leopard men do what they wish with him. When Tarzan and the others find out, they all head for Opar, just in time to save the Professor. However, after seeing Tarzan, La falls in love with him and plans to get rid of Jane.