| This minifigure has only appeared in video game(s)|
Although this article is about an official minifigure, it never existed in physical form, or appeared in any official LEGO sets.
Samuel Sterns is a man who was affected by Gamma radiation, but unlike others like Abomination, Hulk or She-Hulk, Sterns became smarter rather than stronger, as the radiation made his brain grow. Sterns renamed himself the Leader and set himself the goal of getting Hulk's strength and take over the world. In the Marvel Cinematic Universe, Samuel Sterns was nicknamed Mr. Blue and at some point during the end of The Incredible Hulk, his head enlarges due to Gamma radiation and has not appeared in any other MCU film yet.