The master of magnetism has taken over a missile base, and only the strangest teens of all time stand between him and victory! It’s the X-Men’s first day of class, and Magneto wants to make it a memorable one — and their last!
The Angel is bombarded by radiation when an atomic bomb is tested at one of Tony Stark's installation. The radiation altered his personality and made him evil. Once Iron Man was trying to save him; now he is the one that needs saving from this young X-man.
Being too much of a threat to be left to his own devices, the Avengers start a search for the Hulk. He manages to evade them by escaping into the Atlantic Ocean. Where he finds a most unlikely ally, the Sub-mariner!
The evil mutants have returned and are seeking the location of the heroic X-men. Magneto kidnaps the Angel and plans to use him as bait to lure his teammates into a trap. The X-men will have to face this challenge on their own as their leader Professor X has lost his mutant powers!
Johnny Storm and his girlfriend, Doris Evans, go on a boat line cruise around New York. Little do they know that on the same cruise is none other than Bobby Drake known better as the Iceman! Can they combine their strengths to save everyone from the Barracuda!
The combined might of the Thinker, with a flawless plan, and the Puppet Master, with a puppet of Professor X. Leads to a battle between the Fantastic Four and the uncanny X-men where the outcome could be the destruction of both!
Doctor Octopus has escaped from prison and gathered together Elektro, Kraven, Sandman, the Vulture, and Mysterio. Together they have kidnapped Aunt May and Betty Brant to use as bait for Spider-man. Meanwhile Peter Parker has lost his powers and without them how can he defeat the Sinister Six?!
The X-men have graduated from the academy. Professor Charles must leave them for a short time and his final gift to them is Cerebro! A machine to find other mutants. Meanwhile Magneto has a new plan to defeat the X-men by recruiting the Blob!
Professor X has left on a secret mission, leaving Cyclops as the leader of the X-Men. It doesn't take long for Cyclops to take his first test, when Hank McCoy, annoyed for being treated like a menace by the general public, decides to leave the X-Men, and start a career on wrestling. However, there's another mutant around, another wrestler called Unus, the Untouchable, who seeks to defeat the X-Men!
Professor X summons the X-Men to Europe, where he has been tracing the villain known as Lucifer only to learn that Lucifer has built a bomb which can be detonated by his death. The X-Men arrive in Europe, but are confronted by The Avengers, who are investigating some underground movement Thor's hammer has detected.
A news report prompts the X-Men to head to the Antartica where they are surprised to find that at the other side of an ice crack lies a prehistoric jungle, known as The Savage Land. Its inhabitants turn out to be not that friendly at all...
The X-Men's mutant radar is detecting a super strong mutant in the area, so strong that the radar gets broken. Of course, Professor X is interested in contacting this powerful mutant before Magneto and his Brotherhood of Evil Mutants do
Dr Bolivar Trask has taken to the media to spread his message: that mutants are the enemy of humanity. As the mutant hate starts to spread, Professor Xavier takes to a live televised debate to try to dissuade this unfounded prejudice. However, Professor X never counted on Trask's anti-mutant army, and perhaps the X-Men's greatest foes to date, the Sentinels!
The X-Men discover the meaning of the mysterious Master Mold as they plan a full frontal attack on the Sentinel base. Things go awry when the Beast and Iceman are taken prisoner by the Sentinels, who are looking to use their creator to make them an army of Sentinels. Can the team save Hank McCoy before he reveals too much under their enemies' truth ray?
With the entire team of the X-Men are imprisoned by the Sentinels, Proffessor X goes in search of some form of attack against the Mutant hunting robots. The solution seems to be something to do with the single felled Sentinel from the TV studio. Will Proffessor X be able to figure it all out in time to save his team and stop the Sentinels from taking over all of Earth with their increasing numbers?
Hoping to return his Maggia Gang to prominence, Count Nefaria assembles a group of classic Marvel foes and attempts to force the vacationing X-Men into servitude. Will The Count's shaky alliance hold or will the Most Unusual Fighting Team of All Time prove more than a match?
A group of imposters is holding the nation's capital hostage, demanding a huge ransom, and besmirching the X-men's reputation. The real teens will need teamwork and a little help from Professor X to overcome imprisonment and restore their good name.
As Jean leaves for Metro College, giant insects are destroying crops in the countryside. Professor X and the team investigate, and discover some startling clues that may reveal the reason for the strange appearances.
A determined explorer discovers an artifact in the jungles of Central America, which provides him with powerful new abilities. Can The X-men prevent him from fulfulling an ancient prophecy and enslaving humanity?
The team is separated when Jean and the Professor are drawn Professor X's formidable mental powers are neutralized. With the team fractured, and Xavier powerless, it seems impossible that the X-Men will be able to best this super powered mutant, who turns out to be more familiar than first thought.