The movie "Trespasser" that Patrick and Carol watch on TV is made up of re-edited footage from a deleted subplot that further explained Wendy's mysterious reanimated state.
As a fun reference to Das Geheimnis von Twin Peaks (1990), actress Shellie Marie Shartzer can be seen portraying Wendy's twin cousin "Edith" in the background of both the funeral and house party scenes.
The newspaper articles in the opening were written by actor Cody DeVos and are credited on-screen to sound engineer Aaron Irons, key grip Beau McCombs and 2nd AC Jonathan Brock.
Inspired by American Graffiti (1973), the original screenplay contained a DJ character who broadcasts throughout the film. The DJ's asides were written as the film's narration and the songs he introduced were written into the screenplay as lyrics for cues to be composed by Jordan Lehning.