This X-Men Series Beat the MCU to the Perfect Replacement for Patrick Stewart’s Professor X

Look, when you think 'Professor X', odds are you picture Patrick Stewart in that iconic wheelchair, right? He pretty much owns the role—seriously, it’s hard to see anyone else as the world’s most famously bald, psychic school headmaster. Sure, there’s James McAvoy flexing as young Charles Xavier in the prequel films, and a whole generation grew up on X-Men: The Animated Series, but Stewart's version has become the gold standard. Now, with Marvel rebooting the X-Men for the MCU, we're about to see a new group of mutants and, inevitably, a new Charles Xavier. But here's a little twist: the MCU's boldest competition for an all-new Professor X isn't Fox's aging franchise—it's a TV show a lot of fans managed to miss.

Marvel Did Something Wild on TV, and Most People Slept on It

Before he got everyone obsessed with talking Minnesota criminals in Fargo or brought face-huggers to TV with Alien: Earth, Noah Hawley created what might be Marvel’s strangest and gutsiest live-action project ever: FX’s Legion. This is not your usual X-Men show. Instead, it follows David Haller (think: a mutant with reality-warping powers who's also been diagnosed with schizophrenia) trying to figure out if his hallucinations are really just in his head—or if he’s just one of the most overpowered people on earth.

David's powers run the gamut from telepathy to time travel to, yes, completely bending reality. If you’re familiar with the comics, you know "Legion" is the codename for Xavier’s troubled son, but Hawley takes big, creative swings instead of a straight adaptation. In the show, David’s origin and his ties to Professor X are a mystery for a long stretch, teased with subtle hints like glimpses of a certain wheelchair but never directly spelled out—at least until late in the game.

The Cast and the Ratings (Trust Me: This Show’s Legit)

• Dan Stevens as David Haller/Legion
• Aubrey Plaza as Lenny (wildly unpredictable and awesome)
• Hamish Linklater as Clark
• Jemaine Clement as Oliver
• Amber Midthunder as Kerry
• Jean Smart as Melanie
• Harry Lloyd as Charles Xavier (finally shows up in Season 3—more on that below)

The show only ran for three seasons (27 episodes total), but nearly every critic who checked it out loved it—91% on Rotten Tomatoes, which is pretty rare for superhero TV. The directing and writing were even weirder and better than you’d expect from any X-Men spinoff.

So, When Does Professor X Actually Show Up?

Here’s where things get juicy: for almost two full seasons, Legion dances around David Haller’s connection to Charles Xavier. You get little hints here and there, especially if you know your comics, but Hawley keeps the reveal in his back pocket until Season 3. That’s when Harry Lloyd shows up as Xavier, and, honestly, he nails it—a fresh, effective version that feels totally at home in Legion’s madcap universe. Unlike the movies, we actually get to see him tinkering with Cerebro and flexing his psychic muscle (which, as far as Professor X moments go, feels just right).

Here’s the set-up: David gets locked in a wild battle against the Shadow King (Amahl Farouk, classic psychic bad guy), with the story going full tilt into astral planes and time-hopping. Desperate to stop Farouk, David literally goes back in time to get his dad’s help, yanking Professor X directly into the final stretch of the show. Xavier isn’t just a cameo—he’s crucial to how the last batch of episodes unfold.

'Legion doesn’t just give you a new Professor X—it drags him into a story that’s so weird and unpredictable that even hardcore Marvel fans might not be ready for it.'

This version of Xavier is every bit as compassionate as fans hope, but he gets some edge too. It’s not the version you’ll see in a Marvel blockbuster, but it works, and (in my opinion) it's more interesting for that exact reason.

Now the MCU Wants Its Own Charles, But Legion Got There First

The MCU is getting ready to shuffle the deck on the X-Men, with Thunderbolts director Jake Schreier running point for a new take on our favorite mutants. No cast reveals yet, but the rumor mill is already churning (Sadie Sink as Jean Grey keeps popping up, not the worst idea honestly). One thing’s for sure: they’ll need a new Professor X.

But here’s something to mull over while we wait for Marvel Studios to drop their cast list—Legion already gave us a totally new Charles Xavier, and did it years before Kevin Feige even got the franchise rights back. If you haven’t watched this show, now’s as good a time as any to check out all 27 episodes. It’s inventive, unpredictable, and more than a little overlooked. Whether the next Professor X blows us away or fizzles out, Legion’s take is sitting right there, proof that sometimes you have to get a little weird to get the character just right.