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Panthro, Tygra, and Cheetara return to New Thundera in the Feliner to find more of the Treasure of Thundera, but Mumm-Ra shoots the Feliner down and, as the Fog of Despair, sends them to the Canyons of Youth, which changes them back into Thundercubs. Then Mumm-Ra disguises himself as Lion-O and tells the Thundercubs to find the treasure for him. Meanwhile, back on Third Earth, Lion-O and Snarf decide to go rescue the Thundercats on New Thundera, but they must ask the Mutants to take them to New Thundera in the Rat-Star. The Mutants agree, secretly planning to attack Lion-O once they're in space. They do attack and imprison him and Snarf on the way to Thundera, but they manage to break out. Cheetara meanwhile, using her sixth sense, locates part of the treasure, the Mirror of Truth. The real Lion-O shows up, and uses the Sword of Omens with the Mirror of Truth to restore the cubs to their proper age, and Mumm-Ra reveals himself and turns into Mumm-Ra the everliving. Cheetara uses the mi

Writing:
  • Ron Goulart
  • Peter Lawrence
  • William Overgard

Stars:
Release Date: 1985-01-23
Seasons: 1 2 3 4
Metacritic: 7.5/10
TMDb: 8.2/10
  • Country: US, JP
  • Language: English
  • Runtime: 22

Other episodes for this season

ThunderCubs (1)
Episode 1 - ThunderCubs (1)
ThunderCubs (2)
Episode 2 - ThunderCubs (2)
ThunderCubs (3)
Episode 3 - ThunderCubs (3)
ThunderCubs (4)
Episode 4 - ThunderCubs (4)
ThunderCubs (5)
Episode 5 - ThunderCubs (5)
Totem of Dera
Episode 6 - Totem of Dera
The Chain of Loyalty
Episode 7 - The Chain of Loyalty
Crystal Canyon
Episode 8 - Crystal Canyon
The Telepathy Beam
Episode 9 - The Telepathy Beam
Exile Isle
Episode 10 - Exile Isle
Key to Thundera
Episode 11 - Key to Thundera
Return of the ThunderCubs
Episode 12 - Return of the ThunderCubs
The Formula
Episode 13 - The Formula
Locket of Lies
Episode 14 - Locket of Lies
Bracelet of Power
Episode 15 - Bracelet of Power
The Wild Workout
Episode 16 - The Wild Workout
The Thunderscope
Episode 17 - The Thunderscope
The Jade Dragon
Episode 18 - The Jade Dragon
The Circus Train
Episode 19 - The Circus Train
The Last Day
Episode 20 - The Last Day