S0E3: Apocalypse

They say there's nothing like the first, and the world's very first mutant is no exception. Ominously dubbed Apocalypse, his power might indeed be limitless -- and frighteningly unmatched. Imbued with a dark desire to destroy this reality, and replace it with one of his own creation, it was perhaps inevitable that Apocalypse would face off against Charles Xavier's uncanny X-Men. In this action-stacked episode, viewers are transported back in time to the 1990s (if only for a few minutes) so they may witness a super-powered struggle between good and ancient evil -- a struggle whose ultimate outcome has yet to be decided…