Lion-O's dad King Claudus arrives on Third Earth… and turns out to be a big selfish jerk! Now Lion-O has to deal with his dad before he goes to war with the rest of the ThunderCats.

Mumm-Ra builds a mall that's actually a giant labyrinth designed to trap the ThunderCats forever. Too bad the ThunderCats love the mall so much they could literally spend all eternity there.