Part of the music for the film was created by Pilotpriest. Pilotpriest is the director Anthony Scott Burns's DJ's name.
The hospital room 237 is a reference to The Shining.
The book that Sarah picks up at the library is a novel "We Can Build You" by Philip K. Dick from 1972. It's a 1994, Vintage Books issued trade paperback. Many movies and TV series have been based on science fiction novels or short stories written by Philip K. Dick. Among them some blockbuster movies like Blade Runner (1982), Total Recall (1990) or Minority Report (2002).
Dr. Meyer wears the same glasses that George Romero used to wear.
At 41:34 minutes into the film, a poster of The Terminator (1984) is shown in Riff's (Jeremy) office.