It: Welcome to Derry Finale Will Leave Viewers Terrified and Shocked

Think the early episodes were twisted? It: Welcome to Derry is saving its cruelest shock for the finale, a closer the cast says will shatter expectations and leave viewers rattled.

If you thought the early episodes of It: Welcome to Derry were already pushing the envelope, the cast says the finale is going to go harder. As in: bigger twists, deeper lore, and a finish designed to rattle you.

The promise: more shocks, more Pennywise backstory

The prequel digs into how Pennywise became, well, Pennywise. The first stretch has already thrown some nasty curveballs, and now the young stars are hyping the endgame like it is the show at its most unhinged.

What the cast is teasing

Clara Stack (who plays Lilly) sat down with Amanda Christine and Matilda Lawler to talk about the finale with Collider, and they did not undersell it.

"Reading the scripts, it was shock after shock after shock... there are so many incredible, horrific, and tense sequences. I think people watching are just going to be really terrified and really shocked."

• Matilda Lawler says the last few episodes dig further into the entity's origins and tie into the movies in a more direct way.
• Amanda Christine adds that the end stretch leans into the origin story and connects to both the books and the films, so expect more explicit connective tissue.

Translation: the back half does not just tease the mythology — it goes there. If you have been waiting for clearer bridges between this prequel, the films, and the source material, that is what they are promising.

Season 1 wraps on December 14, 2025.