Samuel Sterns returns as the Leader in Captain America: Brave New World

In "Captain America: Brave New World," Samuel Sterns returns as the Leader after 16 years. He orchestrates a complex plot to undermine President Thaddeus Ross, using his enhanced intelligence to manipulate events and create international chaos. Sterns, who gained superintelligence from Bruce Banner's blood, was imprisoned for decades. He developed a plan to expose Ross's unethical actions, including using mind control to provoke conflict over the newly discovered metal, Adamantium. The film culminates in a confrontation where Captain America, played by Sam Wilson, disrupts Sterns' scheme. Ross transforms into the Red Hulk, leading to his downfall and imprisonment, while Sterns remains a threat despite his arrest.