TheX-MenUniverse will recast its performers form time-to-time to better suit the plot of its next installment. As a result, a fresh take on these X-Men’s backstories, motivations, and their development are explored. Nevertheless, there is one character who, while recast once, has also had his original performer remain in theX-MenUniverse: Professor X. Portrayed by bothPatrick StewartandJames McAvoy, audiences have gotten a nuanced illustration of the most revered X-Men. Here is the evolution of Professor X through each film.

X-Men (2000)

Professor X’s first onscreen appearance is nearly identical to theX-Men: the Animated Seriescharacterization. Wise, intelligent, and a mediator between mutants and humans, Professor X is the voice of reason in the firstX-Meninstallment. Unfortunately, his development is somewhat stunted when he is temporarily put in a coma by Magneto’s machinations.

X2: X-Men United (2003)

Professor X has a more prominent role inX2: X-Men United. After being captured by Stryker’s minions, Stryker uses his mutant son, Jason, to manipulate Professor X into using a second Cerebro to telepathically destroy every mutant on Earth. While Professor X is freed from his brainwashing before he can commit the act, Stryker’s plan reiterates Professor X’s power– unbound, it can destroy an entire race.

X-Men: The Last Stand (2006)

X-Men: The Last Standshows a more conflicted side to Professor X. As audiences get an insight into Jean Grey’s backstory, it’s revealed Professor X has been containing her true power for decades, knowing its full force could wipe out the entire planet. Guilt-ridden when Jean Grey becomes Phoenix,Professor X confronts her and apologizesfor his past mishandling of her strength–only to be destroyed by Jean.

X-Men First Class (2011)

X-Men: First Classgives audiences a thorough backstory to Professor X. Set in the early ’60s, this filmfollows Professor X and Raven Darkholmeas they meet fellow mutants amidst political unrest. A war against time ensues between the newly formed X-Men as they attempt to stop Sebastian Shaw from prompting a third world war. While the X-Men succeed, it’s at a price as Professor X ends up wheelchair bound, andErik Lehnsherr joins Hellfire to seek vengeanceagainst humans.

X-Men: Days of Future Past (2014)

X-Men: Days of Future Pastis a rare treat forX-Menfans as they get to see just about every movie incarnation of their favorite mutants, including both James McAvoy’s Professor X and Patrick Stewart’s older version of the character. McAvoy’s Professor X is dealing with the aftermath ofX-Men: First Class, nihilistic towards life given his wheelchair-bound state. Meanwhile, the future Professor X struggles to keep the remaining X-Men alive as Logan travels back in time to stop the catastrophic event that leads to the Sentinels uprising. Professor X undergoes several emotional trials throughout this film; from being a jaded hero coming to terms with his condition, doing what’s right once again, to his older version’s demise at the hands of the Sentinels.X-Men: Days of Future Pastgives viewers a fleshed-out depictionof Professor’s X’s journey from beginning to end.

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X-Men: Apocalypse

X-Men: Apocalypsereintroduces audiences to the classicX-Menheroes from the original couple of films, and some new ones as well. Cyclops, Jean Grey, and Jubilee are all being trained by Professor X, who has reopened The Xavier School for Gifted Youngsters as a safe haven for any mutants seeking assistance with their powers. WhileX-Men: The Last Standdabbles into Jean Grey’s backstory,X-Men: Apocalypsehas a different take on it, where instead of containing Jean’s powers, Professor X guides her to unlock them to defeat Apocalypse. This incarnation of Professor X is the perfect combination of James McAvoy’s and Patrick Stewart’s respective characterizations.

Logan (2017)

Logangives a somber look into theX-Menuniverse. Living in a post-apocalyptic world,Logan struggles with lifeas his powers are diminishing while Professor X is unable to control his. Suffering from recurring seizures, Professor X has killed countless humans and X-Men in the wake of his episodes. It’s disheartening to see Professor X transition from one of the most contained mutant forces into a withering being with virtually no self-control. This is also the one instance whereProfessor X is killed indefinitely,finishing his journey as a tragicX-Mensuperhero.

Related:Guardians of the Galaxy Holiday Special: Did Kevin Bacon Introduce the X-Men?

Patrick Stewart as professor X in X-Men 2000 Marvel

X-Men: Dark Phoenix

X-Men: Dark Phoenixhas Professor X turned from hero to villain in the eyes of his X-Men allies. This film focuses on Jean Grey’s journey from the repressed X-Men afraid of her powers into the destructive force, Phoenix. As more of her backstory is explored, the X-Men question whether Professor X’s actions were more destructive than helpful, holding him directly responsible for Jean’s actions and causing a divide between them. By the film’s conclusion, audiences are left with the universal message that superheroes, above all, are still imperfect, flawed beings.

Doctor Strange In the Multiverse of Madness

Doctor Strange in the Multiverse of Madnessgives audiences a Professor X entirely separate from any of his previous incarnations. This time around, Professor X is part of the Illuminati; a group that attempts to stop Wanda Maximoff’s murder spree across the multiverse. Professor X meets his demise at the hands of Maximoff, and considering every prior Professor X incarnation, this one feels like a poorly handled way to introduce Professor X to the MCU.

Professor X in the Cerebro machine in X-Men

x men Last Stand

x-men first class

Patrick Stewart as Professor X in X-Men Days of Future Past