pressed against the bars of his cell, screaming and pleading that he is innocent, while the camera focuses on a gargoyle drawn in blood on the wall of his cell. Earlier in the episode, Mulder told Scully that he and Patterson disagreed on the best way to investigate serial murders, and Patterson always tried to empathize with the suspect, imagining himself in the killer's place. Mulder's closing narration concludes that it was this that eventually drove Patterson insane, but Mulder cannot account for what he saw while fighting Patterson. Production "Grotesque" was written by Howard Gordon, who conceived of the main story after he noticed stone gargoyles on a corner of a New York street he was walking down. The eeriness of the occurrence led Gordon to develop a tale involving possession by a gargoyle spirit. He wrote a draft script for the episode, but the weekend before production began, he had to completely rework it with the help of series creator Chris Carter. During those few days, the two overhauled the script to add more psychological aspects to the episode. Gordon was "very proud" of the final product. The producers originally planned to film the opening scene at a Catholic hospital, but the hospital they were interested in using did not want to affix a faux gargoyle to the building. Thus, the shot was relocated to Heritage Hall, a building that had been both a post office and a Royal Canadian Mounted Police office in the past. At the last minute before filming, city workers began tearing up a sidewalk on the very spot where the producers planned to film the scene; these caused a panic among the producers, but the construction crew assured the show that the construction would be completed before the show's scheduled shooting time, which it indeed waswith only two hours to spare. Additional exterior shots were filmed at an alley near Bonanza Meat Market, the walls of which were painted to match those of Heritage Hall. The episode was directed by Kim Manners, who cited it as his favorite third-season episode and praised David Duchovny's performance in this episode, saying "Duchovny drove himself, and he was brilliant in that show." Manners also said of the episode: "I think 'Grotesque' is a frightening show. I think it is a disturbing show, and I think that's why—for me—it's such a good show. We pulled it off