Lion-O has nightmares of Thunderian countrymen who were left behind on Thundera while he and the other ThunderCats escaped. Jaga tells Lion-O that the Thunderians survived Thundera's destruction after being rescued by space-traveling Berbils and that they are alive and well on a deserted island somewhere on Third Earth. Lion-O and the ThunderCats set out to find the Thunderians, but so does Mumm-Ra and his followers. The Thunderians are sent to fire rock mountain and Lion-O must save them from there. The Mutants arrive at Fire Rock Mountain to take control of the prisoners. The Thunderians attempt to escape their prison. Lion-O arrives at the mountain and is confronted by Hachiman who believes (thanks to Mumm-Ra's evil magic) that Lion-O is causing the suffering of his ancestor. ThunderCats close in on rescuing the Thunderians from Fire Rock Mountain. But then Mumm-Ra himself makes an appearance to try and defeat the Cats. Jaga then arrives with some much needed supernatural help in the form of Star of Thundera after the Star helps him defeat Grune the Destroyer. Mumm-Ra manages to take the Star from Jaga but to no avail. When he tries to use its powers himself, it instead attacks and seeminlgy destroys him. In the end, the Thunderians Lynx-O, Bengali, and Pumyra have an anointment ceremony to become offical ThunderCats and are welcomed into Cat's Lair.
Story added by danny85 on November 23, 2025
Add a new role:
What type of role is this?
Or import all roles at once
Add at least 2 roles with cast suggestions to unlock Cast Chemistry analysis.
A comprehensive document for tracking all facts, history, characters, and rules within this fictional universe.
Curate the perfect soundtrack for your story — add tracks from Spotify, YouTube, or Apple Music to set the mood for your cast.
No roles added yet.
