A pharmaceutical company develops a "cure" for the X-gene. This divides the mutant community: some see it as a choice for a normal life (Rogue), while others see it as a threat of genocide (Magneto).

Is being a mutant a "disease" to be cured or a "gift" to be embraced?

Jean Grey returns from the dead, but her psychic powers have evolved into a primal, destructive force called "The Phoenix." She becomes a wild card that both Professor X and Magneto try to control. 2. Key Players & New Faces

Making his debut, played by Kelsey Grammer. He is a diplomat and the Secretary of Mutant Affairs.

The film explores what happens when power (Jean Grey) becomes so great that it can no longer be contained by morality or friendship. 4. Viewing Tips

This was originally intended to be the finale of the trilogy. While later films like Days of Future Past changed the timeline, this remains the "end point" for the original 2000s continuity.

The son of the man who funded the "cure," symbolizing the struggle of mutants trying to please their human parents.

The final battle on Alcatraz Island is one of the largest set pieces in the franchise. Look for the creative ways the mutants combine their powers.