Spider-Man (1994), Episode 17
Spider-Man's progressing neogenic mutation is making him ill. He approaches Professor Charles Xavier to help him find a cure. In doing so he meets the X-Men but is disappointed to learn that Xavier does not 'cure' mutancy, and only teaches mutants how to control their abilities. But before Spider-Man leaves, Beast tells him about Dr. Herbert Landon who is working on a cure for mutants. Desperate for a cure, Peter Parker attends one of Landon's demonstrations only to find himself in a death match between himself, Wolverine and the Hobgoblin!