Aldrich Killian is a fictional character from the Marvel Comics universe, primarily known as a villain in the Iron Man series. He is portrayed as a brilliant scientist and the founder of A.I.M. (Advanced Idea Mechanics), an organization focused on advanced technology and weaponry. Killian is known for his ambition and desire for power, often using unethical methods to achieve his goals. In the film Iron Man 3, Killian is depicted as the main antagonist, played by actor Guy Pearce. He develops a dangerous technology called Extremis, which enhances human abilities but also poses significant risks. His character represents the dangers of unchecked scientific ambition and the moral dilemmas associated with technological advancements.