Watch Online X-Men 2 (2003)

At the White House, agents escort several visitors through the building. One of them steps behind. The man starts to disarm the agents through the building, revealed to be Nightcrawler, a teleporting mutant, and tries to assassinate the President of the United States, but he fails and escapes after being shot by a Secret Service agent, leaving a note demanding "mutant freedom now". Wolverine heads to Alkali Lake but finds nothing left of the base. Logan returns to the school, reunited with Rogue, her boyfriend Iceman, Cyclops, Storm, and Jean Grey. He is requested by Professor Xavier to watch over the children at the school, while Storm and Jean find Nightcrawler with the help of the professor and Cerebro. Cyclops and the Professor visit Magneto in his plastic prison to see if he had any part in the attack on the President. Reading Magneto's mind, the Professor discovers that a covert government operative, William Stryker, has been extracting information from Magneto. A trap is sprung and Cyclops and the Professor are captured by Stryker and his assistant Yuriko Oyama. A military raid of the X-Mansion begins, with the soldiers sedating every student they find. However, the plan backfires when Wolverine strikes back and kills a large number of Stryker's men, while Colossus, Rogue, Iceman, Pyro, and most of the students escape through a series of hidden tunnels in the school. Wolverine confronts Stryker, who fails to shed any light on his past. Iceman returns, saving Wolverine by creating a wall of ice between him and Stryker, and they both escape through one of the tunnels. Stryker's soldiers had already succeeded in sedating six students and managed to break inside Cerebro.

Impersonating Senator Robert Kelly and Yuriko, Mystique gains information about Magneto's plastic prison and provides a means for him to escape, but also finds a plan about another Cerebro, and learns that Stryker is building a second one. Wolverine, along with Rogue, Iceman and Pyro head to Iceman's (Bobby Drake's) parents' home in Boston, where he reveals his powers to his parents. After a 9-1-1 call from Bobby's jealous brother Ronny, the Boston Police Department arrive just as the group is about to leave. Pyro uses his fire manipulation powers to fend off the police, but gets carried away and is prevented from causing further damage by Rogue. The X-Jet arrives to pick them up, and they are quickly targeted by two Air Force fighter jets. They manage to force the pilots to eject with the help of Storm and Jean; however, they are hit by a missile which threatens to crash them. Only due to the sudden intervention of Magneto do they survive. The X-Men then team up with Magneto and Mystique. At their camp, Mystique attempts to seduce Logan by taking the form of Jean Grey, although her scars from their previous fight gives her away, leading her to shape shift into Rogue, Storm and then William Stryker. Magneto learns that Stryker orchestrated the attack on the president to confirm an attack on the X-Mansion, and has been experimenting on mutants, using a drug injected directly into the back of the neck to control them. Jean reads Nightcrawler's mind and determines that Stryker's base is located at Alkali Lake, inside the dam where he plans to kill the world's mutants by building a second Cerebro. Through his son, Jason, Stryker gains control over the Professor. His son is able to project powerful visions in the mind, blinding a person to reality, and through this the Professor is brainwashed to use Cerebro to find and kill all mutants. Mystique is able to infiltrate Stryker's base by impersonating Wolverine. Storm and Nightcrawler search for the kidnapped students. Jean, Magneto, and Mystique are attacked by a brainwashed Cyclops while trying to rescue the Professor and in the process cause damage to the generators that keep the dam from collapsing. The force of Jean's telekinetic blast clashing with Cyclops' optic blast awakens him from his brainwashing, but also cracks the dam due to its strength. Wolverine simultaneously finds Stryker in an adamantium smelting room, where he recovers his memory; 15 years prior, Stryker filled his body with adamantium, but also erased his memory, and he escaped. Stryker himself arrives, along with Yuriko, who is revealed to be Lady Deathstrike. Wolverine manages to defeat Deathstrike and then finds Stryker on a landing pad, where Stryker attempts to bargain Wolverine for his life with stories of his past. Storm and Nightcrawler find the children and break them out of their cell. Magneto and Mystique manage to kill the rest of Stryker's men by setting off their grenades, and Magneto stops Jason and the Professor before the mutants are killed. While disguised as Stryker, Mystique uses Jason to convince the Professor to kill all humans; she and Magneto, along with their new initiate, Pyro, then use Stryker's helicopter to escape Alkali Lake, chaining Stryker to concrete rubble. Meanwhile, Nightcrawler teleports Storm inside of Cerebro where she creates a snowstorm to free the Professor from his telepathic illusion. They all then flee the base as water engulfs it, only to discover that Magneto, Mystique, and Pyro—who had earlier been convinced by Magneto to join them—had escaped on the helicopter. Fortunately, Iceman and Rogue arrive with the X-Jet and everyone gets on board. The dam bursts completely, flooding the landscape and killing Stryker. A malfunction aboard the X-Jet prevents it from taking off; Jean sacrifices herself by leaving the jet and creating a telekinetic wall as a shield against the flood. She activates the X-Jet's primary engines before releasing the torrent of water down on herself, presumably killing her. The X-Men are able to supply the President with files from Stryker's private offices, and the Professor warns him that humans and mutants must work together to build peace or they will destroy each other through war. The next scene returns to the school, with Professor Xavier, Cyclops, and Wolverine talking about Jean's past. They are then interrupted by Colossus and a large number of the students who are supposed to be in Xavier's next class. While they leave, Wolverine tells Cyclops that Jean made a choice and that it was him, which relieves Cyclops a good deal. The film ends with a voice-over by Jean Grey on the process of evolution (a speech originally made by the Professor in the introduction of the first film). The camera floats over Alkali Lake, showing a vague shape of a 'Phoenix' flying above it, hinting at her survival.