Ray Palmer was an accomplished scientist and expert on nano-technology. He joined the expanded Justice League after the Thanagarian invasion of Earth, and served as its top engineer with Steel. As the foremost expert on nanotechnology, Atom assisted the League in repelling Amazo in his revenge towards Lex Luthor. He was, however, little successful, as he was not the League's strongest member. He is voiced by John C. McGinley.