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.
Lion-O is haunted by nightmares of Thunderians being killed on Thundera while he fled to the safety of Third Earth with Jaga and the other ThunderCats. Jaga later tells Lion-O that three more Thunderians have, in fact, survived and are also living on Third Earth. The ThunderCats decide to search for the other Thunderians, but Mumm-Ra has plans as well and takes the new Thunderians as his prisoners to Fire Rock Mountain. Lion-O loses the Sword of Omens in an avalanche while Panthro battles the Fist-Pounder with the ThunderTank as the ThunderCats close in on rescuing the Thunderians from Fire Rock Mountain, but they'll need supernatural help if they are to pass through the Thundranium gasses to reach them...
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.
From beyond any known galaxy, bringing with them the laws and ideas of their doomed planet, come the ThunderCats. These brave and courageous cat-like humanoids carry with them the powerful Sword of Omens, which contains the mysterious Eye of Thundera- the source of the power of all ThunderCats. But there's also a treacherous band of hideous mutants from the planet Plun-Darr who want the sword. Crash landing on Earth, the ThunderCats battle these evil creatures who are aided by the supernatural powers of the deadly and mysterious Mumm-Ra. You'll experience many incredible adventures in this epic science fiction saga.
Earthlings chafe at the peace established by a benevolent alien race and set about to rebel.
In New York City, a relationship is threatened when a young man discovers he's caught syphilis from a tryst with a waitress named Ellie. This threatens his relationship with a new girl. Film critic Amy Taubin co-stars as the new girl who gets the bad news. The director is apparently the same man who edited Fritz Lang's The Testament of Dr. Mabuse.