Welcome to Derry Episode 5: Why Did the Military Switch to Red Lights? The Scene Finally Explained

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Episode 5 of Welcome to Derry ends with chilling loose ends and unanswered questions. Curious about what they really mean? Here’s the detailed explanation you’ve been looking for.

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Discover why the military used red lights in It: Welcome to Derry Season 1 Episode 5, a breakdown of the scene’s meaning and symbolism.

It: Welcome to Derry

It: Welcome to Derry, Season 1, Episode 5, 29 Neibolt Street, follows the army joined by Dick Hallorann and Taniel entering the sewers through the Well inside the house at 29 Neibolt Street. One notable detail in the sequence is that the soldiers use red lights instead of regular white lights.

The red lighting has sparked significant discussion among fans. While it could simply be an atmospheric choice, some viewers have proposed more practical explanations. As one Reddit user noted,

Red light is easy on the eyes, but it’s mostly used so people don’t see you as easy in the dark. In regards to vision, it def limits your vision in the dark. Switch to the regular lens.

Others also explained that red light is much easier to see in the dark, and does not “overwhelm” the eyes the way bright white light does. While the speculations could be endless, especially given the strong association between the color red and Pennywise, the showrunners have not yet confirmed any specific reason for the choice.

Welcome to Derry Showrunners Tease Bold New Pennywise

It: Welcome to Derry showrunners Jason Fuchs and Brad Caleb Kane have hinted that the upcoming episodes of the series will introduce a boldly reimagined version of Pennywise the Clown, once again brought to life by Bill Skarsgård.

“[Skarsgård’s] performance goes to some unexpected places,” showrunner Jason Fuchs told Entertainment Weekly, explaining that the show has opened the door to fresh interpretations of the iconic monster.

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[Bill Skarsgård] has opportunities with this character that the story of the films did not present. Not only are you getting a really, hopefully, thrilling build-up to seeing Pennywise, you are also gonna see Bill doing things you’ve not seen him do in this character yet.

Skarsgård first terrified audiences as Pennywise in It (2017) and It: Chapter Two, and Welcome to Derry promises his boldest, most transformative performance to date.

Welcome to Derry Finale Delivers Major Twists

It: Welcome to Derry is just two episodes away from its highly anticipated finale, and the cast promises that viewers are in for some of the most shocking moments of the series.

“There are so many plot twists within this series that I think are really going to shock the audience,” Clara Stack, who plays the role of Lilly Bainbridge, told Collider, adding that the final stretch is packed with terrifying and intense sequences designed to leave fans on edge.

A scene from It: Welcome to Derry
A still from It: Welcome to Derry | Credit: HBO Max

Her co-stars Matilda Lawler and Amanda Christine also teased that the closing episodes will dig deeper into Pennywise’s darkest origins, connecting the prequel more directly to both the films and Stephen King’s novel.

“The last episodes dive into the origin story, and they get into the books and the movies. So, just stay tuned for everything to come,” Christine shared.

The finale of the series is set to premiere on December 14, 2025, on HBO and HBO Max, leaving viewers anticipating what’s next for Derry in the series.