Season 4
01. Impact
The X-Men pursue Apocalypse in Mexico, hoping to find and overcome him before Magneto finds him.
02. No Good Deed
The Brotherhood cause mishaps so they can stop them and appear to be heroes.
03. Target X
Wolverine finds his clone, X-23, who's trying to destroy Hydra, her creator, and the two team up to complete the mission.
04. Sins of the Son
Xavier is told he has a son, who has been kidnapped in Scotland. So he and the X-Men head there to find him.
05. Uprising
Hate crimes against mutants in Bayville prompt Spyke to return to stop the violence.
06. Cajun Spice
Rogue is kidnapped by Gambit, who says he's there to help her; and the X-Men search for her, led by Wolverine.
07. Ghost of a Chance
Kitty is rescued by a mutant and invites her to join the institute. But the mutant soon vanishes, and only Kitty remembers her.
08. Ascension (1)
Xavier finds Apocalypse in Egypt, and Apocalypse unleashes four horsemen, who battle the X-Men.
09. Ascension (2)
The battle against Apocalypse rages as X-Men, the Brotherhood, and Acolytes join forces to stop him from turning all humans into mutants.