Air date: 9/10/86

Recurring nightmares of Thunderians killed on Thundera as he fled to safety with Jaga and the other ThunderCats awaken Lion-O. Jaga comes to tell him that they in fact survived and are living on Third Earth. After meeting with the other ThunderCats, they decide to begin searching for them but Mumm-Ra has plans as well.

ThunderCats Ho! – Pt. 2

Air date: 9/10/86

Lion-O's rescue attempt fails and the captured Thunderians are taken to Fire Rock Mountain after another failed attempt on their part to break free from their captors.

ThunderCats Ho! – Pt. 3

Air date: 9/10/86

Lion-O loses the Sword of Omens in an avalanche. Panthro battles the Fist-Pounder with the ThunderTank. The Mutants arrive at Fire Rock Mountain to take control of the prisoners.

ThunderCats Ho! – Pt. 4

Air date: 9/10/86

The Thunderians attempt to escape their prison. Lion-O arrives at Fire Rock Mountain and is confronted by Hachiman who believes Lion-O is causing the suffering of his ancestor.

ThunderCats Ho! – Pt. 5

Air date: 9/10/86

Lion-O and Hachiman are reconciled and the ThunderCats close in on rescuing the Thunderians from Fire Rock Mountain. But they'll need supernatural help if they are to pass through the Thundranium gasses to reach them.