The Leader is one of the most dangerous gamma mutations alive, possessing super-genius intellect instead of brute strength. Once Samuel Sterns, a lowly laborer, he was transformed by gamma radiation into a green-skinned mastermind with vast knowledge, psychic abilities, and an ever-evolving brain.

First Appearance:  Tales to Astonish #62 (1964)
Creators:  Stan Lee,  Steve Ditko
Powers:  Super-Genius Intellect,  Gamma Radiation Manipulation