Ep. 9: Yui descubre que la medicación es un mutágeno viral mientras Emma se enfrenta al cerebro detrás de todo

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Yui reveals that the medication is experimental and designed to suppress mutant powers from awakening, but has instead become a viral mutagen. Emma follows Jun deep in the laboratory and confronts him as his true persona: Mastermind, leader of the Inner Circle, who used the U-men as part of the plan and framed Emma of affecting Jean. The two fight, then Marsh intervenes, but the X-Men arrive and save Emma. Mastermind affects Wolverine into attacking his own team, but Cyclops snaps him out of it. Emma manages to expose Mastermind. While the X-men confront the Inner Circle members, Xavier battles a psychic opponent in the void. (Source: Wikipedia)