: In a tragic twist, Apocalypse converts several iconic characters into his Horsemen, including Professor Xavier , Magneto , Storm , and Mystique .
Following the Season 3 cliffhanger, Season 4 immediately establishes a more mature tone. The threat of En Sabah Nur (Apocalypse) forces the X-Men into an uneasy alliance with their former rivals, the Brotherhood. The stakes are raised early in the season premiere, "Impact," which begins the countdown to a global mutant conversion. X-Men: Evolution - Season 4
: The finale, "Ascension," showcases a rare collaborative effort where the X-Men, New Mutants, and the Brotherhood split into specialized strike teams to dismantle Apocalypse’s pyramids across the globe. Key Character Arcs and Departures : In a tragic twist, Apocalypse converts several
The final season of represents the series' most ambitious shift, moving away from high school drama toward a high-stakes, serialized war against the ancient mutant Apocalypse. Despite a shortened run of only nine episodes, Season 4 delivered a definitive conclusion that cemented the show's legacy as a unique, modern reimagining of the X-Men mythos. A Darker Tone: The Rise of Apocalypse The stakes are raised early in the season
While the season is plot-driven, it manages to provide closure for several long-standing character threads: