The town of Derry is mentioned on the store sign where the police car crashed. Derry is one of the most famous fictional towns created by Stephen King.
The letter Harold (Owen Teague) received has the Cemetery Dance Publications logo on it. This company published several of Stephen King (Stephen King)'s books.
The town center that Harold (Owen Teague) walks through and finds the crashed police car is the same Vancouver town used for the town of Storybrooke in the show Once Upon a Time (2011). The police car crashed into the Storybrooke Clock Tower and Library.
Katherine McNamara, who plays Julie Lawry, has her song "Making a Monster Out of Me" played during the episode.
As Harold (Owen Teague) enters his bedroom after the altercation with the two teens, there is a picture displayed briefly of the cover King Crimson's album "In the Court of the Crimson King". The Crimson King, an apex antagonist in many of Stephen King (Stephen King)'s stories, is Randall Flagg's master in the "Dark Tower" series while Randall Flagg is the main antagonist in this story.