Episode Title:
The Unearthly Prophecy.
Episode Description:
Urko and his army are searching the desert for the entrance to the Underdwellers' caverns. Suddenly, Urko spots Bill. He radios Dr. Zaius with the news. Bill plans to decoy the army so that Jeff can slip away. Huge rock pinnacles abruptly jut up from the ground, a hole opens up and a flash of energy shoots out. As the doorway closes, the two men crawl in and ride a conveyor down a dark shaft. Urko feels that the Underdwellers are responsible and proceeds to find their caverns...
