In another dimension, the villainous scientist Duke of Zill, with the help of his mechanical, geometric army, ultimately takes over the golden kingdom of Oriana, where Duke has just escaped exile! But Felix the Cat must bravely save Princess Oriana and restore order once again, from her terrible Uncle Zill and his smoke-belching mechanical troops before he can put his sinister plot into action!

SilverHawks is an American animated television series developed by Rankin/Bass Productions and distributed by Lorimar-Telepictures in 1986. The animation was provided by Japanese studio Pacific Animation Corporation. In total, 65 episodes were made. It was created as a space-bound equivalent of their previous series, ThunderCats. As was the case with ThunderCats, there was also a SilverHawks comic book series published by then-Marvel Comics imprint Star Comics. Currently, Warner Bros. owns the rights to the series.

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 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.