Neutron is a nuclear-powered super-villain and enemy to Superman. His body was caught in a reactor meltdown, turning him into sentient nuclear energy that can only be held in a special containment suit. Eventually he was killed during Salvation Run. He has been a member of the Fearsome Five, Intergang, the Nuclear Legion, the Secret Society of Super-Villains and the TNT Trio. Neutron was created by Marv Wolfman and Joe Staton, first appearing in Action Comics #525. (1981)

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