
In episode 4 of IT: Welcome to Derry, the world finally learned about Pennywise the Clown's true form and how an alien creature from outer space called The Galloo became a despicable creature on Earth.
The new information connects the curse surrounding the town of Derry to its ancient history and an out-of-this-world horror, laying the ground for a spine-tingling backstory of Stephen King's most popular evil entity.