The maniacal baby of the Griffin family, Stewie, meets his future self. In doing this he discovers that his future image is not what he has anticipated because of a near death experience.

Another thrilling adventure for the ThunderCats, when they stage a daring rescue attempt that tests them to their ultimate limits. After the destruction of Thundera, Mumm-Ra discovers that three Thunderians have survived and are living in peace with their rescuers, the Berbils. Mumm-Ra enlists Hammerhanc and his wicked crew to capture them, and uses his new captives to lure the ThunderCats to the one place that will rob them of their powers - Fire Rock Mountain. Determined to save their fellow countrymen, the ThunderCats rise to the challenge - but is the challenge too great?...

The Great Ak calls a council of the Immortals to ask that Santa Claus be given immortality. And to justify it, he tells the history of Santa Claus. The Ak found an abandoned baby and gave it to a lioness and a fairy to raise, who named him Claus. When Claus grew up, the Great Ak showed him the evil and hardship in the world and Claus decides to live there and relieve some of the suffering. He decides to make toys for orphans, but King Awgwa, the ruler of the valley where Claus lives doesn't want the children to be happy, and there is a great battle among Immortals.

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 Thunderians (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 Thunderians 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.