Brilliant but ruthless criminal mastermind obsessed with destroying Superman.
Lenny is Lex's nephew and criminal accomplice.
Lenny orchestrates a jailbreak to free his uncle, Lex Luthor, from prison.
Lex engineers Nuclear Man and directs him against Superman.
Lex creates Nuclear Man by attaching Superman's genetic matrix to a nuclear missile and later aligns with the resulting entity.
Lex's scheme drives the central conflict with Superman.
Lex creates Nuclear Man specifically as a weapon against Superman, and Superman later apprehends Lex and returns him to prison.
Explore the full interactive character relationship map of Superman IV: The Quest for Peace
Related entry on Wikidata (Q105123177), public domain (CC0).