- Sauron (Karl Lykos) (First appearance as Karl Lykos)
- Zaladane (First appearance)
- Garokk (Main story and flashback) (First appearance)
- Fall People (Main story and flashback)
- Jean Grey (Mentioned)
- Mister Sinister (Nathaniel Essex) (Mentioned)
Sauron kidnaps Storm to the Savage Land in order to feed from her mutant energy. Wolverine, Beast, Rogue, and Jubilee go after him back to the Savage Land.
- The control screen in the jet-craft Karl Lykos uses to leave the Savage Land (which was left there by Magneto), lists the destinations of Los Angeles, Houston, New York City, and Asteroid M.
- First time on the show that Wolverine being tossed at an enemy is referred to as a Fastball Special.