Tarzan and Basuli, upon further exploration, discover that the cave leads to a mine under the direction of a greedy businessman named McTeague; Jane and Professor Porter meanwhile inform Keewazi that due to the chemical separation of dirt from ores, the chemicals are being dumped into the river. Tarzan and Basuli infiltrate the mine, but are captured by McTeague. With some help from latecomers Terk and Tantor, Jane and Professor Porter rescue the pair, who have become friends through their trials together. Jane then proposes they build a dam, to cut off the water flow. When McTeague sees this and demands to have the water back, Keewazi refuses and unleashes the river all at once, creating a flash flood that destroys the mine. McTeague and his men surrender and retreat, defeated. After this, Tarzan makes peace with the Waziri.
Elenco: Michael T. Weiss , Olivia d'Abo , Jim Cummings , Nicollette Sheridan .