Tarzan and the Great River (1967)

In "Tarzan and the Great River," Tarzan receives a call for help from an old friend in Brazil, where a malevolent tribal cult threatens to annihilate local villages and enslave the inhabitants. To confront this dire situation, the Jungle Lord teams up with a beautiful blonde doctor, a young boy, and a seasoned sea captain. Together, they embark on a perilous adventure to thwart the cult’s destructive plans and protect the vulnerable natives from oppression.