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‘It: Welcome to Derry’ Episode 4 Rewrites the Mythos and Raises the Stakes

A midseason trailer now points to fuller Pennywise appearances in the coming episodes.

Overview

  • Episode 4 delivers a pivotal lore update that recontextualizes the entity’s origin and clarifies why it cannot leave Derry.
  • The series elevates Indigenous custodianship of the town’s history, with Dick Hallorann’s abilities surfacing long‑guarded knowledge.
  • A Cold War program led by General Francis Shaw pushes to harness the creature for military purposes, escalating danger for the town.
  • The hour intensifies fear through harrowing encounters that deepen the kids’ psychological toll while still withholding a full clown reveal.
  • A closing setup signals a path toward a famed gateway to the creature’s domain, as new episodes premiere Sundays at 9 p.m. ET on HBO and Max.