South Surrey, near where the previous episodes "Home" and "Tunguska" had been filmed. The show's art department rented and refurbished the house, took photographs of the building, then returned it to its original state for the actual filming. The paintings of the house were then manipulated with Adobe Photoshop and Corel Painter, allowing it to look like Amy Cassandra had made numerous paintings of the house. The show's camera operators and editors made use of several distortion techniques to give the flashback sequences a hazy, uneasy, and "dystemporal" feel. First, the camera's shutter was "continuously stopped and started" to give the captured scenes an "out-of-time" feel. The scenes' colors were then manipulated by having the film strips negatives filtered with strobe lights during processing and development. To add to the sense of disorientation and confusion, the scenes' dialogue was mixed in with ambient background noise by producer Paul Rabwin. Reception "Demons" was originally broadcast in the United States on the Fox network on May 11, 1997, and was first broadcast in the United Kingdom on BBC One on . This episode earned a Nielsen rating of 11.8, with an 18 share, meaning that roughly 11.8 percent of all television-equipped households, and 18 percent of households watching television, were tuned in to the episode. It was viewed by 19.10 million viewers. Critical response to the episode was mostly positive. Zack Handlen from The A.V. Club wrote highly of the episode and awarded it an A−. Handlen praised the episode's exploration of Mulder's mind, noting that the entry allowed the audience to see Mulder's views of the world. He argued that "Mulder's desperate need to understand what happened to his sister […] drives him to expect betrayal, because at least with betrayal, the world makes some kind of sense." He did write, however, that he was "a little disappointed at how "Demons" doesn't really hold up in retrospect from a story perspective," but noted that "what does work here is great." Paula Vitaris from Cinefantastique gave the episode a largely positive review and awarded it three-and-a-half stars out of four. She wrote that "Demons" works "as a character study of Mulder" and praised the episode's "hyper-realistic flashback" sequences. Vitaris, while calling the structure of the story "not particularly imaginative", wrote that "Mulder's condition is intriguing". Not all reviews were positive. Robert Shearman and Lars Pearson, in their book Wanting to Believe: A