Supergirl's mid-season finale confirmed an unlikely hero's role in Crisis on Infinite Earths.
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The final scene confirmed that The Monitor has recruited Lex Luthor to save the multiverse.
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Lex died in Supergirl's season 4 finale, killed by his sister Lena.
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However, a scene at the end of the finale suggested The Monitor had resurrected Lex.
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The final scene of "The Wrath of Rama Khan" confirmed that Lex was alive.
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The Monitor returned to his realm, where a bored Lex Luthor was playing chess against himself.
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The Monitor informed Luthor that the multiverse needed a mind like his to survive.
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Unlikely as it may seem, Luthor may yet become the hero he sees himself as.
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