Synopsis

Having broken free from Mumm-Ra’s enchantment, the Thundercubs departed safely from New Thundera. Lion-O and Snarf then faced the daunting task of confronting Mumm-Ra and retrieving the Book of Omens. Their victory secured, they summoned Mu-Mutt with a magical flute, requesting he employ Mumm-Ra's own device to transport them back to Third Earth. Simultaneously, the Lunataks seized several Berbils, while the Thundercubs returned to Third Earth, where they and the Thunderkittens were compelled to