Bio: In the pre-Crisis reality, NRG-X was a robot used to handle hazardous materials at the Shady Point nuclear plant, controlled by its inventor Grant Haskill by means of an exo-skeleton. When a protestor's bomb wrecked the plant, Haskill's mind was somehow transferred into the robot. His shock at discovering this was misinterpreted by Superman as hostile action, forcing him to defend himself and go on the run.
#68 - 'The Big Noise, Part 1: Rumble Face' #69 - 'The Big Noise, Part 2: Benediction Redux' #70 - 'The Big Noise, Part 3: Righteous Destroyer' #71 - 'The Big Noise, Part 4: The Final Solution'