In the second episode of "IT: Welcome to Derry", a character from Stephen King's novel "The Shining" appears. This article contains possible spoilers from Stephen King's IT novel.
The Stephen King crossovers are becoming more frequent in the series. In addition to the clue-filled opening credits and numerous IT references in the first episode, episode 2 introduces a character from a different Stephen King novel.
The character in question is Dick Hallorann, played by Chris Chalk, who is revealed to be a soldier at the air force base in Derry. He is the same character who works as a chef at The Overlook Hotel in "The Shining" and helps Danny Torrance understand his psychic gift.
Dick Hallorann, from Stephen King's "The Shining", is a significant character in the episode.
Author's summary: Dick Hallorann appears in IT: Welcome to Derry episode 2.