When it comes to X-Men villains, Magneto tends to dominate the conversation, while Apocalypse has the whole ancient mutant warlord thing down to an art form. But lurking behind some of the most disturbing moments in X-Men history is a pale-faced, red-eyed geneticist with a diamond planted squarely on his forehead. Mister Sinister is one of those villains whose fingerprints are seemingly everywhere.
Known originally as Nathaniel Essex, Sinister is a brilliant geneticist whose obsession with evolution, mutant DNA, cloning, and creating what he considers the perfect genetic specimen has made him one of the X-Men’s most persistent enemies. His schemes have particularly revolved around Cyclops, Jean Grey, their descendants, and the extraordinary genetic potential of the Summers and Grey bloodlines.
And now, after years of fans waiting to see the villain properly realized in live action, Mister Sinister appears to finally be making his way into the Marvel Cinematic Universe, with Adam Driver stepping into a very intriguing version of the role.
Adam Driver Is Playing Nathaniel Milbury in Marvel’s ‘X-Men’
One of the biggest surprises to come out of Disney’s D23 showcase was the announcement of the cast for Marvel Studios’ upcoming X-Men film, currently scheduled to arrive in theaters on May 5, 2028. The new lineup includes Sadie Sink as Jean Grey, Kit Connor as Cyclops, Christopher Abbott as Professor Charles Xavier, Maya Boyd as Storm, Inde Navarrette as Rogue, and Samara Weaving as Emma Frost.
Appearing via video, Driver announced that he would be playing a character named Nathaniel Milbury. Marvel’s own post-D23 PR language reportedly described Milbury as a “very sinister figure,” making the implication rather difficult to miss. And no, Marvel didn’t simply decide that Nathaniel Essex needed a new surname.
Nathaniel Milbury is a name Mister Sinister has actually used in the comics. Comics reference sources list Nathaniel Milbury among Essex’s additional names and aliases. That makes Marvel’s very specific choice of name worth paying attention to.
So Who Is Nathaniel Milbury Compared to Nathaniel Essex?
Nathaniel Essex is Mister Sinister’s real name. Nathaniel Milbury is an alias associated with Essex.
The Milbury name is also tied directly to his personal history. Essex’s wife was Rebecca Milbury, and the couple lived at Milbury House in Victorian England. They had a son, Adam, whose early death helped push Essex further into his increasingly obsessive scientific work. Later in his extraordinarily long life, Essex used the name Nathan Milbury while continuing his genetic research. Comics lore connects that identity to his efforts to study generations of genetic material, including the Summers bloodline.
In other words: Nathaniel Essex is his original identity and Mister Sinister is the identity he becomes later known by his transformation. Nathaniel/Nathan Milbury are one of the identities Essex has used while operating among ordinary society.
So Driver announcing himself as Nathaniel Milbury is not evidence that Marvel has necessarily reinvented Mister Sinister as a completely different person. It’s actually quite the opposite. It’s a remarkably nerdy reference to Essex’s comic-book history.
Why Would Marvel Call Him Nathaniel Milbury Instead of Mister Sinister?
Marvel’s more careful wording around Nathaniel Milbury leaves room for the movie itself to reveal exactly how the identity works. Marvel could be setting up Milbury as the identity the other characters initially know. Let’s say we imagine meeting Driver’s character as an accomplished scientist named Nathaniel Milbury. Perhaps he presents himself as someone studying mutation, helping mutants, or even working alongside Charles Xavier. Only gradually do we discover exactly who he is.
That’s of course speculation for now, but using Milbury rather than immediately calling him Nathaniel Essex would give director Jake Schreier and his team an opportunity to preserve some mystery around the character for audiences unfamiliar with the comics.
Nathaniel Essex Was a Scientist Before He Became Mister Sinister
Long before Professor Xavier opened his school or the X-Men suited up, Nathaniel Essex was a scientist living in 19th-century England.
Following the death of his young son, Essex became consumed by theories of evolution. But Essex wasn’t exactly interested in letting nature take its course. He believed humanity possessed untapped genetic potential and began conducting increasingly unethical experiments in his quest to understand and manipulate evolution.
His experiments eventually attracted the attention of none other than En Sabah Nur, better known as Apocalypse. Apocalypse recognized Essex’s brilliance and genetically altered him, granting him extraordinary abilities and longevity. Essex would eventually become the figure known as Mister Sinister.
What Are Mister Sinister’s Powers?
His greatest weapon is arguably his intelligence. He’s one of the Marvel Universe’s foremost experts on genetics, cloning and mutant biology. Centuries of genetic experimentation have also allowed Sinister to acquire and manipulate a variety of superhuman abilities.
His abilities across his comic history have included telepathy, telekinesis, superhuman strength, energy projection, shapeshifting, extraordinary durability and molecular control over his body. Essentially, the man has spent generations collecting and manipulating mutant DNA like Pokemon cards, except his collection comes with horrifying human experimentation.
Why Is Mister Sinister Obsessed With Cyclops?
If there is one family that probably deserves a restraining order against Mister Sinister, it’s the Summers family. Sinister became fascinated with Scott Summers, aka Cyclops, and eventually recognized enormous genetic potential in the combination of the Summers and Grey bloodlines. He believed that combining Scott and Jean’s genetic material could produce an extraordinarily powerful mutant, one potentially capable of standing against Apocalypse. And this is where things get very messy.
Mister Sinister Created Madelyne Pryor
Sinister used Jean Grey’s genetic material to create Madelyne Pryor, a clone of Jean who eventually became part of Scott Summers’ life after Jean was believed dead. Scott and Madelyne married and had a son. That child was Nathan Summers. You probably know him better as Cable. This is all covered in the animated series X-Men ’97 by the way if you’ve ever watched it.
For Sinister, Nathan represented the culmination of his obsession with the genetic potential of the Summers and Grey bloodlines. So if you’ve ever tried explaining the Summers family tree to somebody and watched their eyes glaze over, you can partially blame Mister Sinister.
When Did Mister Sinister First Appear?
Mister Sinister’s first full comic-book appearance came in 1987’s Uncanny X-Men #221, written by Chris Claremont with art by Marc Silvestri. His history was subsequently expanded considerably, transforming Nathaniel Essex into a character whose influence stretches backward through generations of mutant history. That longevity has become central to the character and Sinister isn’t simply another villain waiting around for the X-Men to stop him. He’s constantly studying mutant evolution, collecting genetic material, producing clones and playing the longest game imaginable.
And if Marvel is beginning its new X-Men saga with Jean Grey, Cyclops and Mister Sinister already on the board, things could get wonderfully messy very quickly.
