Episode 1: Growing Pains
When Scott and Kurt use their powers to save several people from a car crash, the question of how much they're willing to ignore to keep their powers secret comes up. Professor X maintains that the world is not ready to know about them. However, the other mutants, now without Mystique's guidance, have other ideas ...
Episode 2: Bada-Bing Bada-Boom
Boom Boom flirts with Nightcrawler, and then gets a visit from her criminal father who wants her to commit a crime for him. Tabitha reluctantly agrees, but then crosses the way of the Brotherhood, and joins them at the end of the episode.
Episode 3: Power Surge
Jean's abilities start growing in sudden bursts. At first she tries to ignore it, but with each burst she has increasing trouble regaining control. Meanwhile, the school gets a new science/phys. ed. teacher.
Episode 4: Fun and Games
While Professor X has to mend Juggernaut's stasis cell, the younger X-Men trick Cyclops and Jean Grey to exit the Mansion in order to have a party. However, there is a guest with sinister intentions.
Episode 5: Beast of Bayville
Dr. Hank McCoy has no energy left to fight his mutation, which forces him to be a violent Beast. When he finally becomes a monster, Spyke is the only one who can possibly reach Dr. McCoy.
Episode 6: Adrift
Scott becomes lost at sea when trying to find his brother, who was swept out by freak wave while surfing.
Episode 7: African Storm
Storm is tormented by Houngan, an evil African shaman who wants to take over Africa. Storm and the X-Men have to stop an enemy who knows every weakness of hers.
Episode 8: Joyride
Lance comes to the mansion, wanting to join the X-Men. Unfortunately he has a hard time fitting in, and it doesn't get any easier when he gets the blame for some of the other students' nightly joyrides in the various X-Men vehicles.
Episode 9: On Angel's Wings
Xavier starts worrying about the existence of mutants becoming public knowledge when the media starts reporting multiple sightings of a man with angel wings. With most of the X-Men on Christmas leave, and Cerebro down for repairs, Scott and Rogue are left having to track the man down themselves.
Episode 10: Mindbender
Jean has nightmares about huge circus clowns, then is controlled by the master of that circus, with Nightcrawler, Kitty, and Spyke controlled also.
Episode 11: Shadow Dance
Forge is working on a device that will let Kurt teleport around the world when they realize when Kurt teleports, he passes through a beast-infested dimension. After a close shave, Kurt vows not to work on the project anymore, but at the school dance, Kurt's only partially closed dimension doors let the beasts into the school. (Recap Available)
Episode 12: Retreat
In order to help a depressive Beast out of his slump, Kitty arranges a field trip with the New Mutants. However, hunters catch Beast, thinking him to be Bigfoot, and the young mutants must save their teacher from life in captivity.
Episode 13: Walk on the Wild Side
When Jean and Amara feel like the boys think they are stronger than the girls are, Tabitha decides that they should form a girl's crime fighting club. After getting Kitty and Rogue to join, they begin to fight crime at night as the Bayville Sirens, while the rest of the town, as well as the rest of the X-Men, try to figure out who they are.
Episode 14: Operation: Rebirth
Nick Fury informs Wolverine that Magneto has stolen a device once used to create the super-soldier Captain America. Wolverine, Rogue and Nightcrawler go to recover it. Meanwhile, Logan reminisces about his history with Captain America during World War II.
Episode 15: The HeX Factor
Mystique breaks the Scarlet Witch out of an asylum and brings her to Brotherhood House. Mystique kicks Tabitha out of the house. Quicksilver meets up with his sister, the Scarlet Witch. The X-Men get defeted by the Brotherhood for the first time. Lance shows more feelings for Kitty.
Episode 16: Day Of Reckoning (1)
Wolverine suddenly vanishes, as the Brotherhood members team up with the X-Men to defeat Magneto. They take off to fight him, leaving behind the new recruits. As soon as the ships take off, the institute goes into self-destruct mode. Before it can close off the doors, Amara gets out and is narrowly saved by Tabitha from the institute's weapons. They find Scott, who stayed behind because he felt too angry to stay with the team, and enter the mansion to help the others out. But as they reach the control room, the clock is counting down from 10 seconds...
Episode 17: Day Of Reckoning (2)
The Brotherhood/X-Men arrive where Magneto is with his new allies, but Quicksilver suddenly reveals he is part of Magneto's team. The others begin to battle the allies, but without warning, Magneto caves in the ground, and a mega-robot sentinel is released. The government agents with the sentinel trap a few members of the team, and the remaining retreat back to the destructed institute. Scott and the other students explain how they escaped then Scott suddenly accuses the Professor of setting it up. Professor X suddenly morphs into Mystique, shocking them all, stating that "Things are about to get much worse ..."
Source Wikipedia and Tv.com