<P> Whilst series one and two of Black Mirror were shown on Channel 4 in the UK, in September 2015 Netflix commissioned the series for 12 episodes, and in March 2016 it outbid Channel 4 for the rights to distribute the third series, with a bid of $40 million . The 12 - episode order was divided into two series of six episodes each . </P> <P> According to Annabel Jones, the series' co-creator, "Hang the DJ" was intended to reflect on the state of dating in the present day and the "general sense of loneliness". Charlie Brooker came up with the idea of the dating app by analogy with Spotify: it determines one's perfect mate by running through a "playlist" of prospective partners and evaluating one's responses to each partner until the algorithm finds the best match . One challenge with the episode was to keep the twist--that most of the events took place within a computer simulation--unclear until the very end while still providing enough detail to make the viewer aware that something was off with the setting . Another aspect Brooker and his writers discussed was how long to have the semi-permanent relationship between Amy and Frank last . They ultimately settled on five years . Brooker said that when Frank discovers this time period "it's not devastating news, but it's not forever", and he thinks, "' Okay that's a reasonable amount of time for a serious relationship, a serious bond ."' </P> <P> Some exterior filming took place at Painshill, a centuries - old landscape park in Surrey . One of the original remaining structures, an abbey, served as the backdrop for the Pairing Day ceremony scene . Two instrumental pieces for "Hang the DJ" were created by Sigur Rós and Alex Somers . </P> <P> In May 2017, a Reddit post unofficially announced the names and directors of the six episodes in series 4 of Black Mirror . The first trailer for the series was released by Netflix on 25 August 2017, and contained the six episode titles . </P>

Meaning of hang the dj in black mirror