What if HBO Max had one last Halloween surprise hiding in the Western Wood?

On Saturday, October 31, 2026, fans of Stephen King’s IT and HBO’s IT: Welcome to Derry were treated to an unexpected 30-minute special, IT: Welcome to Derry – A Story of Derry.

What initially appeared to be a fun Halloween bonus turned out to be something far more significant. This one-shot special answered lingering questions from the show’s first season, revealed the origins of Derry’s supernatural prison, and delivered a moment Stephen King fans have waited decades to see brought to the screen.

Rather than featuring Pennywise in his familiar clown form, the episode travels hundreds of years into the past, to a time when the land that would become Derry was inhabited by an Indigenous people who knew that a terrible evil lurked within the Western Wood.

Before Pennywise, There Was the Western Wood

The story unfolds through the eyes of the fictional Shokopiwah tribe, introduced in IT: Chapter Two and expanded upon in the first season of Welcome to Derry.

Long before English settlers established the town, the Shokopiwah lived in the surrounding territory. They feared a monstrous ancient spirit dwelling in the Western Wood, an area they avoided because of generations of terrifying stories about those who ventured too close.

As food becomes increasingly scarce and English settlers threaten to disrupt the balance, three young members of the tribe decide to enter the forbidden forest to hunt.

Necani, played by Kiawentiio, is the determined daughter of the tribe’s leader. Accompanying her are Kino, played by Isabel Deroy-Olson, a medicine woman in training, and Maneese, played by Michael Podemski-Bedard.

The three quickly discover that the frightening stories are more than cautionary tales. Something ancient is waiting within the trees, and it has no intention of allowing them to leave unharmed.

The Ancient Evil That Became IT

The creature haunting the Western Wood is the same primordial, shape-shifting entity that will eventually become known as Pennywise the Dancing Clown, feeding upon the fear of Derry’s children in recurring cycles approximately every 27 years.

Stephen King readers know that IT originates from a vast cosmic existence beyond our familiar reality, often associated with the Macroverse.

The special expands that mythology through the explanation of a mysterious warrior, revealing that the creature had once been imprisoned within a falling star and banished to Earth after an ancient cosmic conflict.

When the star struck the planet, its bindings broke apart, releasing the creature into the wilderness, where it began hunting and taking different forms.

Among those forms was a monstrous bull moose, a horrifying creature with dark fur and terrible antlers that attacked an earlier hunting party. This disturbing history helps explain why the tribe feared the Western Wood long before Derry itself existed.

A Mysterious Warrior and a Deadly Secret

Just when the three youngsters appear to be doomed, a mysterious warrior named Mitig, played by Zahn McClarnon, comes to their rescue.

Wearing a cedar-tree mask and carrying a powerful dagger made from a fragment of the fallen meteor, the stranger possesses something that the otherwise terrifying entity fears.

The warrior explains that he is the lone survivor of an earlier encounter with the monster and that the meteor fragments are capable of keeping it at bay.

He also introduces the youngsters to an unusual root that allows a person to commune with a cosmic being known simply as the Turtle.

But the warrior’s hospitality hides something far more sinister.

The children discover that the meat he has been feeding them comes from murdered English settlers. The man who first appeared to be their rescuer has become a deeply disturbed servant of the very evil he claims to fear.

Realizing the danger, Necani, Kino, and Maneese flee his camp, taking the meteorite dagger with them. Without his weapon, Mitig is left vulnerable to the entity, which ultimately kills him.

The Biggest Treat of All: Maturin the Turtle

Anyone familiar with the deeper mythology of Stephen King’s IT knows the importance of Maturin the Turtle.

Maturin is an ancient, benevolent cosmic being associated with creation and is presented as a metaphysical counterweight to the destructive evil represented by IT.

In King’s wider mythology, the Turtle is famously connected to the creation of the universe and to the cosmic forces explored in his Dark Tower stories.

For decades, filmmakers have teased the Turtle’s existence through background details, visual references, and symbolic imagery. Yet the creature itself remained largely unseen in live-action adaptations.

That finally changes in A Story of Derry.

After the death of Necani’s mother, Sesqui, and with the tribe considering abandoning its ancestral land, Kino uses the mysterious root recovered from the warrior’s camp to commune with Maturin.

In an ethereal vision, the cosmic Turtle reveals the location of the meteor fragments that can be used to construct a new prison for the monster.

It is a brief appearance, but an enormously satisfying one for fans who have long wondered whether a live-action adaptation would ever fully embrace this particularly strange corner of King’s mythology.

A Mother’s Sacrifice and the Thirteen Pillars

One of the special’s darkest confrontations involves Sesqui, played by Morningstar Angeline, the Shokopiwah leader and Necani’s mother.

During a terrifying encounter, the entity takes the form of an English Puritan priest, played by Eric Trask, exploiting Sesqui’s fears and memories before fatally wounding her.

Her death leaves Necani devastated but also determined to protect the land her mother fought to defend.

When the elders propose moving the tribe to safety, Necani refuses to accept that abandoning their home is the only option.

With Kino’s knowledge from Maturin, they discover an extraordinary alternative.

The Shokopiwah collect thirteen fragments of the fallen star, pieces of the entity’s original cosmic bindings, and use them to construct a new prison around the Western Wood.

The resulting pillars create an invisible boundary, giving the creature sufficient territory to survive, sleep, and feed while preventing it from escaping into the wider world.

The tribe commits itself, and the generations to come, to maintaining those pillars and protecting their homeland from the ancient evil.

Suddenly, one of the central mysteries of IT: Welcome to Derry has a much clearer explanation.

The Military, the Dagger, and the Secrets of Season One

This thirty-minute special does much more than deliver a chilling standalone Halloween story.

It also helps explain several important mysteries introduced during the first season of IT: Welcome to Derry.

The creation of the thirteen pillars clarifies why their locations are so significant, why disturbing them can endanger Derry, and why the military’s interest in the town’s supernatural history is so potentially dangerous.

We also gain a much clearer understanding of the origin of the meteorite dagger, the weapon that can repel the seemingly unstoppable entity.

The special connects the ancient Shokopiwah struggle to the events witnessed centuries later, demonstrating that Derry’s curse is not merely a recurring supernatural disaster. It is also the consequence of an ancient system of containment that future generations must struggle to understand and preserve.

Perhaps most importantly, the story gives greater weight to the Shokopiwah’s role as guardians rather than simply background figures in the terrifying history of Pennywise.

What Comes Next for IT: Welcome to Derry?

With a second season already renewed and expected to explore Derry in 1935, there are plenty of reasons for Stephen King fans to remain excited.

The Halloween special leaves us with intriguing possibilities about the deeper connections between the entity, Maturin, and the larger cosmic universe that King has constructed across his novels.

Whether those possibilities eventually lead to additional connections with The Dark Tower or remain within the mythology of IT is still unknown.

But one thing is certain: A Story of Derry was far more than a throwaway Halloween bonus. It expanded the mythology, filled in meaningful gaps from Season One, and gave longtime King fans one of the most anticipated supernatural reveals in the franchise.

And if this is what HBO Max has waiting for us between seasons, we can expect IT to be one hell of a ride.