Watch ThunderCats Roar Season 1 full episode online free watchcartoononline.
Storyline: Lion-O and the ThunderCats Tygra, Panthro, Cheetara, Wilykat and Wilykit barely escape the sudden destruction of their home world, Thundera, only to crash land on the mysterious and exotic planet of Third Earth. Lion-O, the newly appointed Lord of the ThunderCats, attempts to lead the team as they make this planet their new home. A bizarre host of creatures and villains stand in their way, including the evil Mumm-Ra, Third Earth’s wicked ruler who will let nothing, including the ThunderCats, stop his tyrannical reign over the planet.