All 65 episodes from the second and final season of the classic animated childrens series. In this season, when a recurring vision torments leader Lion-O, the Thundercats realise that three more Thunderians must have survived the destruction of Thundera. A daring rescue mission pits the Thundercats against the villainous Mumm-Ra, who has strengthened his forces of mutants and broadened the range of his dark territories. Ultimately Lion-O saves the new Thunderians, but the cost is high: Mumm-Ra becomes even more powerful and more determined to destroy the Thundercats.