A spaceship freighted with a lethal radioactive sphere is on a collision course for Third Earth. If it crashes, Third Earth will be destroyed. Lion-O and Panthro take the Feliner up to intercept the spaceship and neutralize the danger. Mumm-Ra materializes before the Mutants to strike a deal: Seize the sphere and they will all rule Third Earth with its threat of total destruction. The Mutants accept the bargain. Mumm-Ra creates a storm, which enables Jackalman to secretly board the Feliner. As Lion-O and Panthro intercept the spaceship, Jackalman steals the radioactive sphere. He later ignores the deal he has made with Mumm-Ra and the other Mutants and makes off with the sphere for himself. An enraged Mumm-Ra seizes Jackalman and takes him to his Pyramid. The Mutants, realizing they have been double-crossed, give pursuit. The Thundercats, realizing that Third Earth is in great danger, follow. Mumm-Ra fights all of them as he scales the face of the Pyramid. He is toppled from the Pyramid in a hail of Thundercat firepower, and defeated when Panthro thrusts the sphere in Mumm-Ra's face: Mumm-Ra sees his own reflection there and flies to the safety of his crypt. The Thundercats explode the deadly sphere deep in outer space. Third Earth is safe.

This episode can be found on

Disc 10

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