IT: Welcome to Derry S1E4 — The Great Swirling Apparatus of Our Planet's Function

8.0

IT: Welcome to Derry•Season 1•Episode 4

The Great Swirling Apparatus of Our Planet's Function

8.0/10 · 16,415 votesNov 16, 202563 min

Ranked #5 of 8 in Season 1•−0.3 vs season avg

Discussion

As the kids face increasingly terrifying experiences, Charlotte attempts to advocate for Hank, and General Shaw escalates his efforts.

Directed byAndrew Bernstein

Written byHelen Shang

Previous episodeE3 · Now You See It Next episodeE5 · Neibolt Street

Seasons2

All 1 2

Season 1 Episodes8

E1 8.0

The Pilot

E2 7.7

The Thing in the Dark

E3 7.5

Now You See It

E4 8.0Now viewing

The Great Swirling Apparatus of Our Planet's Function

E5 8.6

Neibolt Street

E6 8.0

In the Name of the Father

E7 9.3

The Black Spot

E8 9.2

Winter Fire

Cast10

Taylour Paige

Charlotte Hanlon

Jovan Adepo

Leroy Hanlon

James Remar

General Francis Shaw

Stephen Rider

Hank Grogan

Matilda Lawler

Marge Truman

Amanda Christine

Ronnie Grogan

Clara Stack

Lilly Bainbridge

Blake Cameron James

Will Hanlon

Arian S. Cartaya

Rich Santos

Chris Chalk

Dick Hallorann

Crew3

Andrew Bernstein

Director

Rasmus Heise

Director of Photography

Helen Shang

Writer

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Episode Summary

"The Great Swirling Apparatus of Our Planet's Function" is episode 4 of IT: Welcome to Derry season 1. It scored 8.0/10 from 16,415 votes, ranking #5 of 8 episodes this season (season average 8.3). Directed by Andrew Bernstein and written by Helen Shang, it aired on November 16, 2025.

Next: E5 · Neibolt Street Best of Season 1