Ancient Spirits of Evil
S5, E2: Thundera is attacked by Reptilians and Panthro is taken hostage. Though Lion-O comes to his father's aid, `Panthro' is revealed to be Mumm-Ra, an old nemesis of the Thundercats.

S5, E2: Thundera is attacked by Reptilians and Panthro is taken hostage. Though Lion-O comes to his father's aid, `Panthro' is revealed to be Mumm-Ra, an old nemesis of the Thundercats.