Defenders of the Earth - Season 1 - Eps 26: Terror In Time
After retrieving a vat of deadly mutant slime from Ming's laboratory, six of the Defenders (LJ and Kshin do not appear in this episode) are chased through a time warp and go back to the days of King Arthur. There, they meet and join forces with Prince Valiant who tells them that his wife, Alita, is being held prisoner by the evil Warlock who has stolen the fabled Eternity Stone. And, to further complicate matters, the mutant slime - which has already infected Mandrake - escaped from the Shuttle when the Defenders crashed into the sea and begins to spread.
About Defenders of the Earth

Title: Defenders of the Earth
First Air Date: 1986-09-08
Last Air Date: 1986-12-05
Status: Ended
Rating: 7.5/10 (from 83 votes)
Language: EN
Seasons: 2
Total Episodes: 65
Network: Syndication
Genres: Animation, Action & Adventure
Production Companies: Marvel Productions, King Features Syndicate
Synopsis
Defenders of the Earth is an American animated television series produced in 1986, featuring characters from three comic strips distributed by King Features Syndicate—Flash Gordon, The Phantom, and Mandrake the Magician—opposing Ming the Merciless in the year 2015. Supporting characters include their children Rick Gordon, Jedda Walker, Kshin, Mandrake's assistant Lothar, and Lothar's son L.J. The show lasted for 65 episodes; there was also a short-lived comic book series published by Star Comics, created by Gerry Conway, Ross Andru and John Romita, Sr.. The closing credits credit Rob Walsh and Tony Pastor for the main title music, and Stan Lee for the lyrics. The series was later shown in reruns on the Sci Fi Channel as part of Sci Fi Cartoon Quest.
Cast

Buster Jones

Peter Mark Richman

Loren Lester

Peter Renaday

Sarah Partridge

Lou Richards

William Callaway

Hal Rayle

Ron Feinberg

Diane Pershing