<P> Though the short was well - received, no production companies wanted to invest in the idea as a full - length film . Entwistle and Buchanan decided to make a television series with Clerkenwell Films, and then Channel 4 and Netflix became involved . Forsman had no official role in the show's production, wanting to continue working on his comics, though Entwistle would regularly consult him and keep him updated . </P> <P> The programme's plot differs from that of Forsman's comics . In print, the children kill a satanist serial killer, whose wife was a police officer; instead the television series features police officers Eunice Noon and Teri Darego, and does not show the serial killer to be a satanist . Another major difference is the ending of the graphic novel: the satanist police officer chases after James, and the two begin to attack each other, while police try to break up the fight . There is then a gunshot . In the final scene, Alyssa's mother talks about her daughter being safe from James, while Alyssa is seen carving the name "JAMES" into her arm . Some critics interpreted this to mean that James was dead, but Forsman sees the ending as ambiguous . </P> <P> The first series began filming in April 2017 and concluded a few weeks before the show's release in October 2017 . Though filmed in England, the programme has an American tone to it; Entwistle was inspired by Twin Peaks and Fargo . Episodes were filmed largely in suburban areas and across Surrey, with locations such as Woking, Bracknell and Longcross Studios . Another filming location was Leysdown - on - Sea on the Isle of Sheppey . Entwistle uses mostly close - up shots, particularly in early episodes where most frames feature only one character . He uses this for deadpan humour, by moving from face to face to get shots of characters' reactions . </P> <P> The series is set in the present day, but Entwistle aimed to make it feel like it could have been set "any time from 1988 to 2006". Additionally, diners have a 1970s - style design, and the soundtrack features songs from the 1950s, 60s and 70s, along with original music from Graham Coxon, the founding member of Blur . Entwistle describes Coxon's scores as "guitar - based suburban noir", and notes that more of his music is used in later episodes for the police officers . </P>

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