Watch Thundercats series free. A new take on the original 1980s animated series, combining fantasy with science as the heroes and villains on the show fight for the Stones of Power. The ThunderCats are on the move! After the kingdom of Thundera is attacked by the lizard people, Lion-O leads Tygra, Cheetara and the other heroes on a quest for the Book of Omens and the magic stones of legend. But he'll have to face villains like Mumm-Ra, the ancient evil sorcerer, and Slithe, the dangerous lizard general. Luckily, he has the Sword of Omens and its amazing powers at his disposal. ThunderCats, ho!
