S3 E1 • L'Alliance mystique

The X-Men and Brotherhood deal with the after math of the world finding out about mutants. Mystique, diguised as Professor X, manages to blow up the Insitute. Some of the X-men and Brotherhood were captured, leaving the mutants that escaped to find them and the professor.

S3 E2 • L'Étoffe des héros

Rogue and Wolverine duck a squad of soldiers when the nationwide alert goes out against mutants, while Storm and Beast go into a meeting of Congress to defend themselves. Meanwhile Juggernaut goes on a rampage and the X-Men feel obliged to take him down.

S3 E3 • Mainstream

During the rebuilding of the manor, Kitty and Kurt intercept a bunch of graffiti artists disguised as monsters. The older students get to go back to Bayville High for one day before attending a hearing to determine their ultimate fate, while they are banned from using their powers.

S3 E4 • Association de malfaiteurs

Wanda goes searching for Pietro. Meanwhile the brotherhood's members are expelled from school, much to Lance's dismay.

S3 E5 • Seul dans la nuit

Mystique escapes from imprisonment while the X-Men repair and rebuild the Institute. Disguised as Alex, she lures Scott into a trap - leaving him stranded in the middle of the Mexican desert without his glasses.

S3 E6 • Mesures extrêmes

Evan enters an extreme Skateboarding competition, and puts his skills to the test. But something is wrong: A mysterious woman is watching and following him during the competition.

S3 E7 • Les Bourreaux des cœurs

Wanda receives a clue from one of Magneto's minions, Pyro, directing her to a sky resort. Meanwhile, Kurt is meeting Amanda's parents for the first time, and the Toad believes he can use Kurt's holo-inducer to disguise himself and win Wanda's love.

S3 E8 • Possédée

Rogue appears to have problems with her powers, as the residual impressions of everyone she has touched start flashing through her mind and body.

S3 E9 • Ouvrir les verrous

Mesmero mentally controls Gambit into stealing half of the Spider Stone from Ange.

S3 E10 • La Croisière

The X-Men are on vacation with Storm as their guardian. Amara falls ill while on the ship.

S3 E11 • X23

A mysterious female assassin terrorizes the X-Mansion, knocking out the X-Men one by one. Wolverine finds out that it is his clone, created by the Dr. Deborah Risman and raised without love by HYDRA, and she wants to kill him because she holds him responsible for her miserable life. Wolverine and X-23, as she is called, square off in a battle that Wolverine does not want to win.

S3 E12 • Sombre Horizon (1)

As Jean's and Scott's graduation day approaches, Rogue suddenly leaves the mansion.

S3 E13 • Sombre Horizon (2)

As all the monsters in tomb attack, the teammates fight to survive and find a way out.