There's an Easter Egg in It: Welcome to Derry that even the most observant fans may have missed, calling back to one of Stephen King's most underrated short stories. It: Welcome to Derry brings King-branded terror to HBO in this prequel to the It films, and it's packed with Easter Eggs for fans of the horror master.

One that may have flown over some heads comes halfway through Welcome to Derry episode 1 . After Matty (Miles Ekhardt) disappears and is presumed dead by Derry, one of his classmates, Lilly Bainbridge (Clara Stack), makes a frightening discovery in her bathroom.

While sitting by her bathtub, Lilly thinks she hears Matty's voice coming out of the drain. As she stares into it and begs him to come home, a solitary finger pops up out of the darkness, shocking Lill

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