IT: Welcome to Derry Episode 4 ends with Dick Hallorann (Chris Chalk) using his psychic abilities — his “Shine,” per Stephen King’s the Shining — to root out the mythic origins of It, the evil being we know as Pennywise (Bill Skarsgård). In the process, the HBO show finally links a controversial bit of new lore introduced by IT: Chapter Two with what we know from the original novel, It…

**Spoilers for IT: Welcome to Derry Episode 4, now streaming on HBO MAX**

In IT: Welcome to Derry Episode 4, Dick Hallorann is asked to interrogate one of the local Indigenous men devoted to keeping the military away from Pennywise. Taniel (Joshua Odjick) is Rose’s (Kimberly Guerrero) nephew and, therefore, custodian of the same ancient knowledge about It as she is.

While Taniel does much to resist, Dick Hallorann has the psychic ability to break down his shields and enter his mind. There, Dick is confronted with a room full of doors, all of which lead to specific memories. He finds one where Rose quizzes young Taniel (Tres Garcia) on their tribe’s legend of the Galloo, a monster who lives in the forbidden Western Wood. What follows is an extended look back at the Indigenous history of Derry, including turns from Outer Range‘s Morningstar Angeline as war chief Sesqui and Avatar: The Last Airbender‘s Kiawentiio as her intrepid daughter, Necani.

This sequence not only brings to vivid life the original vision of It’s arrival as seen by the Loser’s Club in King’s novel, but also adds more lore to the story. Between the final shot of the house on Neibolt Street to Dick Hallorann’s very creepy energy, here’s everything you need to know about the end of IT: Welcome to Derry Episode 4…

IT: Welcome to Derry Episode 4 Ending Explained: What is the Galloo? Is That the House on Neibolt Street?

Yes, the Galloo is just Pennywise who is also just It. An extraterrestrial, ancient, shapeshifting being who crashed on Earth millions of years ago. The Loser’s Club kids have a vision of his arrival in the “Ago” in Stephen King’s novel and we see it play out, initially, the same here. What IT: Welcome to Derry adds is how Indigenous people found a way to live largely in balance with It by staying out of It’s territory and forging a mystical blade out of the meteorite stone that served as his cage when he fell to Earth.

What we then learn, though, is white settlers ignored the locals’ warnings and hunted in the Western Wood. It hunted them and grew stronger, threatening to escape the area for good.

“You know, Stephen King grew up in Bangor, Maine. Bangor, Maine is the Penobscot Country, Wabanaki Country. So he grew up with the natives of Indian Marsh and and the Penobscot River,” IT: Welcome to Derry star Kimberly Guerrero told DECIDER. “So the land remembers everything, even when we forget. That’s the ground Stephen King grew up on. There’s an energy to that. There’s a story that the land itself holds on to. And who’s to even say that that didn’t feed into this very creative young brain who is going to be a capital-s Storyteller?”

“So it was a real gift to get to work with this team on really opening up that part of the hidden engine of the horror and a lot of the King universe is this unresolved trauma —” Guerrero said.

“Childhood trauma,” James Remar added.

“Yes, of the people of the land and the land itself,” she said.

What IT: Welcome to Derry adds to King’s story is the idea that after Sesqui’s death, Necani and the other survivors came up with a plan to “cage” Pennywise in the Derry area by planting thirteen shards from his original meteorite prison around the area.

Guerrero was equally keen to dive into this and credited the production with their approach. “We worked very closely with John Bear Mitchell, our Penobscot elder, with the language and the history,” she said. “It’s something that I think the audiences will feel, even if we don’t go into deep, deep specifics, they’re going to feel that we knew what we were talking about. And we do.”

The story ends with Dick revealing himself to young Taniel in a creepy way that is all the more unsettling when you remember how gentle and kind he was to Daniel, or Danny, Torrence in The Shining. Dick makes Taniel give up one last bit of information, too. He asks him how to find these thirteen sacred shards.

Taniel leads Dick to another door and says, “Follow the tunnels under the old well and you’ll find the pillars.” Inside that room is the house on Neibolt Street from the original It book and films. The dilapidated structure hides the old well that leads to Pennywise’s sewer lair.

So now the military knows how to find Pennywise. Question is, should they still want to find him? (No. We’re just going to say it.)