When a recurring vision torments leader Lion-O, the Thundercats realize 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! Featuring new friends, new foes and new battlefields, Season 2 of this awesome animated favorite roars with more than 12 hours of rousing adventures across this six disc set of Season Two/Vol. One!