The Key House exterior and interior is completely built from scratch by Netflix.
The pilot was originally shot for streaming service, Hulu, who decided to pass on the pilot, and it was then picked up by rival streaming service, Netflix.
Tom Savini, who the"Savini Squad" takes their name from, plays the hardware shop clerk who gives Bode the jar of keys.
Kinsey's head mall is the same as Starcourt Mall from Stranger Things, another Netflix show.
The original comic book takes place in Lovecraft, Massachusetts, which is a tribute to H.P. Lovecraft, a 19/20th century author of gothic horror stories. It was changed to Matheson in honor of writer Richard Matheson, whose work provided much of the inspiration for the original comic.