Sydney walking down the street in a dress covered in blood is an homage to Stephen King's Carrie - Lo sguardo di Satana (1976).
This show was filmed in and around Pittsburgh, Pennsylvania.
Wyatt Oleff and Sophia Lillis had previously worked together in It (2017), It - Capitolo due (2019) and Sia: Santa's Coming for Us (2017).
After the show's cancellation, writer and director Jonathan Entwistle suggested to continue the story in the form of a novel.