Spider-Man: The New Animated Series - Season 1 Episode 3 Law of the Jungle
7.1021 minutes
Peter's professor, Doc Connors, injects himself with reptilian DNA, which slowly changes him into the angry, vengeful Lizard; and since the serum affects Doc Connors' brain, Spider-Man must stop his beloved professor as he begins seeking revenge on those who have harmed him, including Harry.