Season 1

1. The Return

2011-04-01 · 23m

When 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.

2. U-Men

2011-04-08 · 23m

The X-Men carry out an investigation that leads them to the U-Men, a group of mad scientists whose hideout contains a horrifying secret.

3. Armor

2011-04-15 · 23m

Hisako's mutant powers are weakened during a fierce battle between the X-Men and Todd, the U-Men's mad scientist.

4. Transformation

2011-04-22 · 23m

The 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.

5. Power

2011-04-29 · 23m

Emma allows Professor Xavier to read her mind and reveal her thoughts after Cyclops opposes her membership in the X-Men.

6. Conflict

2011-05-13 · 23m

An 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.

7. Betrayal

2011-05-20 · 23m

Having 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.

8. Lost

2011-05-27 · 23m

After 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.

9. Revelations

2011-06-03 · 23m

Revelations abound when it's discovered that Riko and Kaga were drugged by Yui and that Jun and Mastermind are one in the same.

10. Countdown

2011-06-10 · 23m

Mastermind's evil plans are frustrated as a fierce battle between the X-Men and the Four Pillars of the Inner Circle rages on.

11. Revenge

2011-06-17 · 23m

Despite Yui's attempts to suppress them, Takeo's powers continue to gain strength, causing reality itself to become more and more twisted.

12. Destiny

2011-06-24 · 23m

The 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.