After his home kingdom is destroyed by the ancient devil priest Mumm-Ra, the young Thundercat Lord Lion-O leads a team of survivors as they fight evil on Third Earth.
It's an Animal thing.
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Did You Know?
The Book told that it was the ThunderCats, our ancestors, who first defeated Mumm-Ra! It was the ThunderCats who brought law and order to a world of waring animals! And it is now the ThunderCats who are strong enough to maintain this fragile peace!