A mutant from more than half a century into the future, named Bishop, arrives in the present, attempting to change history for the better, by stopping an X-Man from committing an assassination. But between being chased by a future breed of Sentinel, and the details of his mission being fuzzy, he's got his work cut out for him.

Aware of an impending assassination which will create a catastrophic future, the X-Men must deal with threats both outside and within their team.

As the Beast faces an arraignment in court before a mutant-hating public, the X-Men unwillingly take in an old enemy of Wolverine's. Magneto, an old friend turned enemy of Professor Xavier's, attacks a military base in an attempt to unite mutants against humanity.

Prominent anti-mutant and presidential hopeful Senator Kelly is caught in a tug-of-war between Magneto's goal of mutant superiority, the X-Men's dream of peaceful co-existance between mutants and humans, and the mutant-hunting Sentinel robots' goals of global domination.

The X-Men return from Genosha, finding the home destroyed, and Professor Xavier missing. They suspect a super-strong Russian mutant named Colossus, but the real culprit turns out to be someone more human, far tougher, and with deeper ties to the Professor.

An ancient and immensely powerful mutant, known as Apocalypse, creates four Horsemen to help usher in a new world where survival of the fittest reigns.

Having left the X-Men to seek peace in the arctic, Wolverine instead finds himself battling Sabretooth for the safety of an Inuit tribe. Storm, Gambit, and Jubilee investigate an island resort which welcomes mutants, and might be too good to be true.

Rushing to investigate a disturbance downtown, the X-Men find Sabretooth on the rampage again, but realize too late that it isn't really Sabretooth at all. It is the Phalanx, a voracious alien life-form that can assume the guise of anything or anyone. Before long, the X-Men are all captured, except for Beast, who must find a way to stop the alien horror from devouring the entire Earth.

Magneto & Professor Xavier come face to face for the first time in years amid an exploding factory, while Sabretooth & Wolverine face off in the mansion.

Wolverine must overcome his feelings for Jean, and Storm must overcome her crippling claustrophobia, when the team journeys into the sewer to rescue Jean Grey & Cyclops from a race of hideously deformed mutants known as Morlocks, and their leader Callisto, who wants to make Scott her king.

Rogue seeks a scientist who claims to be able to "cure" any mutant of their powers, unaware that neither he, nor his process, are what they appear to be.

Breaking into the Mutant Control Agency's headquarters to destroy the registration files on mutants, the X-Men lose two of their members against the Sentinels, but eventually gain another.

Gambit, Storm, and Jubilee become slave labor on the island resort of Genosha, along with other mutants, forced to help build the new power source for a Sentinel factory. They're given aide in escaping by a mysterious mercenary named Cable.

A young teenager has been rejecting her mutant powers ever since she discovered them. But when giant robots track her down, it's up to the X-Men to save her.

Beast falls in love with his patient, a blind woman named Carly, and though the feelings are mutual, her mutant-hating father and anti-mutant sentiment drive a split between the pair. Meanwhile, Wolverine seeks to take down the Friends of Humanity from the inside out.

Following visions from recent dreams, Professor Xavier sends his X-Men on a mission to the Eagle One Space-Station, putting them in the middle of an interstellar conflict.

Shi'ar Emperor D'Ken's rise to power via the M'Kraan Crystal is causing a universal implosion. The X-Men, Imperial Guard, and Starjammers find themselves overpowered and unable to stop it. Jean Grey must unleash her destiny as the host of the Phoenix, even at a most personal cost.

Bishop, Shard, and the alternate-present versions of Wolverine & Storm, will have one more chance to save Xavier from being killed before he founded the X-Men... if they can survive the alternate-future ruled entirely unopposed by Mastermold.

Finding himself continually losing control, Wolverine takes a sabbatical to Japan, in an effort to find inner peace in temple-building. Instead, he faces a village under siege by a group of bandits, and struggles to help them without compromising his search for his true nature.

Snatched from the jaws of the Phalanx by the villainous Mr. Sinister, Beast and Forge search for allies to help them battle the alien threat. Gathering assistance from such unlikely sources as Magneto and Sinister himself, they embark upon a daring and risky plan to free the planet from the clutches of the Phalanx by traveling straight into the belly of the beast.

The X-Men barely survive their return trip from space, Jean Grey discovering herself changed by the experience. Professor Xavier's dark half is given form, and proceeds to attack his students.

Lilandra seeks to protect the M'Kraan Crystal from her wicked brother, the Emperor D'Ken. But the interstellar pirates known as the Starjammers capture it, and Cyclops, in an effort to enact their own revenge scheme on the emperor.

Bishop & Shard recruit Wolverine & Storm for a time travel mission to save Professor Xavier's life. Except they're from the parallel timeline where he died before founding the X-Men, a world where humans and mutants are in a constant war with one another. Not only do they pair lack a connection to him, but correcting history may put an end to their marriage.

Mutant-draining, pterodactyl-man Sauron is persuaded into capturing Storm by Zaladane, the high priestess of Savage Land Sun God Garokk, unaware of her ulterior motives for unleashing the mutant's full potential.

Storm's unfettered weather-fury continues setting the stage for the rise of Garokk. Even if Storm can be brought back under control, the Sun God's geothermal rejuvenation will spell an end to the Antarctic paradise known as the Savage Land.