Season
- Season 4 1989-09-04
- Season 3 1988-09-05
- Season 2 1986-09-08
- Season 1 1985-01-23
- Season 0
Episode
- Episode 1: Return to Thundera (1)
- Episode 2: Return to Thundera (2)
- Episode 3: Return to Thundera (3)
- Episode 4: Return to Thundera (4)
- Episode 5: Return to Thundera (5)
- Episode 6: Leah
- Episode 7: Frogman
- Episode 8: The Heritage
- Episode 9: Screwloose
- Episode 10: Malcar
- Episode 11: Helpless Laughter
- Episode 12: Cracker's Revenge
- Episode 13: The Mossland Monster
- Episode 14: Ma-Mutt's Confusion
- Episode 15: Shadowmaster
- Episode 16: Swan Song
- Episode 17: Touch of Amortus
- Episode 18: The Zaxx Factor
- Episode 19: Well of Doubt
- Episode 20: The Book of Omens
ThunderCats Season 4 The Heritage
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.
