Episode 1 - One Man's Worth (1)

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.

Episode 2 - One Man's Worth (2)

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.

Episode 3 - Courage

Morph feels he's finally ready to return to the X-Men. But his homecoming is interrupted by the return of the Sentinels, the robotic mutant-hunters who nearly killed him the last time he faced them. Will history repeat itself?

Episode 4 - Proteus (1)

The long hidden secret patient of Muir Island, a reality-warping mutant teen known as Proteus, escapes from his 15 year long captivity, and wreaks havoc across Scotland searching out his father.

Episode 5 - Proteus (2)

Tracking down his father, who is now a candidate for Secretary of State, Proteus continues threatening lives with his uncontrolable powers. It's up to Professor X alone to try to stop the boy who brought even Wolverine to his knees.

Episode 6 - Sanctuary (1)

Magneto builds a home strictly for mutants on the orbiting base known as Asteroid M. The message goes out worldwide of initial exodus, and he finds just as many eager to join him, as those anxious to destroy him.

Episode 7 - Sanctuary (2)

With Magneto seemingly dead, Fabian Cortez takes over Asteroid M, and initiates a nuclear war with Earth. The X-Men attempt to sabotage his warhead stockpile, and rescue Gambit, finding assistance in the most unlikely of places.

Episode 8 - Beyond Good and Evil (1)

Apocalypse steals Cable's computer in the year 3999, allowing him to time travel to the past, where he schemes to bring an end to his struggle against inferior mutants once and for all. This leads to Bishop becoming trapped amid the timestream, and brings

Episode 9 - Beyond Good and Evil (2)

When Oracle, the psychic member of the Imperial Guard is kidnapped by Apocalypse, Professor Xavier deduces his scheme involves capturing mutants with telepathic abilities. The X-Men are split up to track them down before the villains can, which puts Wolverine & Shard in the middle of a scuffle between Archangel and a ninja named Psylocke.

Episode 10 - Beyond Good and Evil (3)

After swiping the government's own time machine, Cable ends up recruiting the X-Men on his mission to destroy Apocalypse's source of immortality at its creation.

Episode 11 - Beyond Good and Evil (4)

Two of Apocalypse's former evil allies, the captive Wolverine, the loose cannon Cable, and the exiled Bishop, come together to free the kidnapped psychics and save reality from being rewritten.

Episode 12 - Have Yourself a Morlock Little X-Mas

Jubilee's first Christmas with the X-Men doesn't go exactly as she expected, when she, Storm, and Wolverine become involved with a mission to save the Morlock child known as Leech.

Episode 13 - The Lotus and the Steel

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.

Episode 14 - Love in Vain

In a New Mexico desert, Wolverine witnesses the crash of a spaceship carrying horrific, alien bug-like creatures—the Family—which overwhelm him. Rogue reunites with her first boyfriend, Cody, who ends up being a part of the Family's plot to have Rogue become their new leader.

Episode 15 - Secrets, Not Long Buried

Cyclops heads solo to the desert town of Skull Mesa, where humans and mutants live in harmony, to visit an old mentor from his youth. But he not only finds himself powerless when he arrives, but discovers the place under the rule of a maniacal mutant, with none of the citizens willing to take a stand.

Episode 16 - Xavier Remembers

Trapped on the astral plane after suffering a concussion, Professor Xavier is at the mercy of the Shadow King, and in desperate need of help from his X-Men, who are unable to hear him.

Episode 17 - Family Ties

X-Factor's Quicksilver, and his sister, the Avenger called Scarlet Witch, seek revenge against Magneto when they learn that he was responsible for their birth mother's death. But the trio is unaware of the common bond between them, nor the true purposes of the mysterious man who brought them all together.

Episode 18 - Delete - No Episode 18 in Season 4