Season 1
12 episodes · Apr 1, 2011
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S1E1The Return
Apr 1, 201123mWhen a young girl named Hisako Ichiki goes missing in northern Japan, her parents seek help in Professor Xavier, who calls on the X-Men to unite.
S1E2U-Men
Apr 8, 201123mThe X-Men carry out an investigation that leads them to the U-Men, a group of mad scientists whose hideout contains a horrifying secret.
S1E3Armor
Apr 15, 201123mHisako's mutant powers are weakened during a fierce battle between the X-Men and Todd, the U-Men's mad scientist.
S1E4Transformation
Apr 22, 201123mThe X-Men are put at risk of secondary mutation when the Blackbird is attacked by a bat-like creature showing dangerous signs of Damon-Hall Syndrome.
S1E5Power
Apr 29, 201123mEmma allows Professor Xavier to read her mind and reveal her thoughts after Cyclops opposes her membership in the X-Men.
S1E6Conflict
May 13, 201123mAn intense battle ensues when the X-Men are attacked by remnants of the U-Men after being forced to execute an emergency landing in the Blackbird.
S1E7Betrayal
May 20, 201123mHaving defeated the U-Men, the X-Men come face to face with Yui Sasaki at her underground base, where she once ran a school for mutant children.
S1E8Lost
May 27, 201123mAfter falling ill with Damon-Hall Syndrome, Riko and Kaga attack the X-men's base, while Emma spies on a stranger in her diamond form.
S1E9Revelations
Jun 3, 201123mRevelations abound when it's discovered that Riko and Kaga were drugged by Yui and that Jun and Mastermind are one in the same.
S1E10Countdown
Jun 10, 201123mMastermind's evil plans are frustrated as a fierce battle between the X-Men and the Four Pillars of the Inner Circle rages on.
S1E11Revenge
Jun 17, 201123mDespite Yui's attempts to suppress them, Takeo's powers continue to gain strength, causing reality itself to become more and more twisted.
S1E12Destiny
Jun 24, 201123mThe X-Men mount an attack to bring down Professor Xavier's son, Takeo, before he destroys the world, putting an end to both mutants and humanity.