"The Coming of ...Stegron the Dinosaur Man!"
Dr. Vincent Stegron, a research assistant to Dr. Curt Connors, steals a formula that transforms him into Stegron, the Dinosaur Man. He plans on using dinosaurs from the Savage Land to conquer Earth. It's Spider-Man, Ka-Zar and Zabu's job to stop him.
First appearance of Stegron.