ThunderCats (1985)

S1E33 Dimension Doom

Every 7,000 years, Wiz-Ra, a longtime adversary of Mumm-Ra, returns through a portal located in Cheetara's bedroom. He possesses a powerful helmet that grants him the ability to manipulate minds. When the moment arrives for Wiz-Ra to emerge, Mumm-Ra seizes the helmet for himself. Teaming up with Wiz-Ra, Cheetara sets out to reclaim the helmet and liberate the ThunderCats from its mind-controlling influence.