ThunderCats - Season 3 - Eps 10: Exile Isle
The Thundercats capture the Lunataks and, tired of dealing with their evil ways, decide to exile the Lunataks to Exile Isle, an island in space far away from Third Earth. When the Lunataks arrive, they meet up with Captain Cracker, a pirate who the Thundercats also exiled. Together, the Lunataks and Capt. Cracker send out a distress signal to a passing ship. When the ship comes near the island, the Lunataks send up a cloud of fog, which makes the ship crash. They use the engines of the ship to push the planet out of orbit and towards Third Earth. Snarfer, on his way home from Thundera, crashes on the island when it runs into him. Lion-O goes to rescue Snarfer and stop the island, because it has a deadly gas that will blow up if it enters Third Earth's atmosphere. He goes without the Sword of Omens. He gets cornered by Capt. Cracker, but the Sword awakens and flies to Lion-O, without him even calling it. He then uses dirt to stop the engines, and the planet/island eventually returns to
About ThunderCats

Title: ThunderCats
First Air Date: 1985-01-23
Last Air Date: 1989-09-29
Status: Ended
Rating: 8.2/10 (from 1033 votes)
Language: EN
Seasons: 5
Total Episodes: 130
Network: Syndication
Genres: Animation, Sci-Fi & Fantasy, Action & Adventure, Kids
Production Companies: Rankin/Bass Productions, Lorimar Telepictures
Synopsis
The inhabitants of the planet Thundera evacuate just before it is destroyed. They were pursued by a band of mutants. All but one of their escape ships was destroyed. Only a small group of Thunderans (Thundercats) remained. With only half engine power, the group, which was led by Jaga, had to set a course for the nearest planet. Jaga commanded their ship while the other seven were in their stasis tubes. Jaga died on their journey to Third Earth and their ship crashed there. Soon they made friends with various groups in the area and they designed a fortress. Mumm-Ra the centuries-old embodiment of evil, along with the mutants that destroyed the rest of the Thunderans are a constant threat. But Lion-O, the new leader of the Thundercats, with his weapon the "Sword of Omens" will help the Thundercats to have a standing chance.
Cast

Larry Kenney
Lion-O / Jackalman (voice)

Peter Newman
Tygra / WilyKat / Monkian (voice)

Earle Hyman
Panthro (voice)

Lynne Lipton
Cheetara / WilyKit (voice)

Earl Hammond
Mumm-Ra / Jaga / Vultureman (voice)

Bob McFadden
Snarf / Slithe (voice)

Gerrianne Raphael
Pumyra (voice)

Doug Preis
Alluro (voice)