The film is based off of a true story. In 2014 a couple bought a house in New Jersey for them and their kids. They began receiving threats from someone who named themself as The Watcher. They claimed to know everything about the house and that it was a family obsession.
Denise Crosby (Jeanne) played Lt. Tasha Yar on Star Trek: The Next Generation, and the Dr. was played by John Billingsly, who also played the alien doctor on Star Trek: Enterprise.