Superman IV: The Quest for Peace

Lex reappears in Superman IV: The Quest for Peace, escaping from prison once more, this time with the aid of his nephew Lenny (portrayed by Jon Cryer). Once again, Lex allies himself with other villains, in this instance a cadre of war profiteers and arms dealers who are worried about what Superman's efforts toward nuclear disarmament will do to their business. Lex uses his own DNA, combined with strand of Superman's hair that is stolen from a museum, to create a hybrid clone which he dubs "Nuclear Man." The radioactive villain possesses abilities similar to Superman, but receives his power from direct sunlight, whereas Superman can still operate in darkness. Superman exploits this weakness eventually, destroying Nuclear Man and returning Lex to prison.