section_path: Production/Series 4
section_name: Series 4
paragraph_text: Series 4
  
  Brooker said that the fourth series of six episodes has more variety than the third. He began writing in July 2016 and continued throughout the 2016 United States presidential election; he told Digital Spy that he did not know what demand there would be for "nothing but bleak nihilism" and thus included "more hope" than in previous series. The first episode made was " Arkangel ", which was filmed in Canada in November 2016.: 221 The Netflix budget allowed them to set and film "Crocodile" in Iceland and make the special effects-intensive episode "Metalhead".: 221 Filming concluded in June 2017.
  
  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 debuted on 25 August 2017 and two promotional photos were released in September. Beginning on 24 November, Netflix published a series of posters and trailers for each episode in the fourth series of the programme, referred to as the "13 Days of Black Mirror ", concluding on 6 December with the announcement of the release date, 29 December 2017.
  
  "USS Callister" is a space epic based around a video game company, starring Jesse Plemons as CTO Robert Daly and Cristin Milioti as the new programmer Nanette Cole. "Arkangel" is an episode about a mother implanting an invasive technology in her daughter, starring Rosemarie DeWitt as Marie and Brenna Harding as Sara, and directed by Jodie Foster. "Crocodile" is about the consequences of a hit-and-run, starring Andrea Riseborough as Mia. " Hang the DJ " is a love story between Amy, played by Georgina Campbell, and Frank, played by Joe Cole, centred around an artificial intelligence that selects people's partners for them. "Metalhead" is a black-and-white apocalypse episode starring Maxine Peake as Bella, a woman trying to escape a robotic "dog", and directed by David Slade. "Black Museum" is an anthology of three stories, one of which was written by the magician Penn Jillette. Focused around a crime museum, the episode stars Douglas Hodge as Rolo Haynes and Letitia Wright as Nish.: 225–309
  
  According to Engadget and Gizmodo, as a means of viral marketing Netflix sent private messages to users of the Turkish website Ekşi Sözlük. The messages were sent from the account "iamwaldo" and read, "We know what you're up to. Watch and see what we will do." Although the advertising was met with positive reception from some users, others were concerned by distress that the messages may have caused.
  
  Brooker said that the fourth series of six episodes has more variety than the third. He began writing in July 2016 and continued throughout the 2016 United States presidential election; he told Digital Spy that he did not know what demand there would be for "nothing but bleak nihilism" and thus included "more hope" than in previous series. The first episode made was " Arkangel ", which was filmed in Canada in November 2016.: 221 The Netflix budget allowed them to set and film "Crocodile" in Iceland and make the special effects-intensive episode "Metalhead".: 221 Filming concluded in June 2017.
  
  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 debuted on 25 August 2017 and two promotional photos were released in September. Beginning on 24 November, Netflix published a series of posters and trailers for each episode in the fourth series of the programme, referred to as the "13 Days of Black Mirror ", concluding on 6 December with the announcement of the release date, 29 December 2017.
  
  "USS Callister" is a space epic based around a video game company, starring Jesse Plemons as CTO Robert Daly and Cristin Milioti as the new programmer Nanette Cole. "Arkangel" is an episode about a mother implanting an invasive technology in her daughter, starring Rosemarie DeWitt as Marie and Brenna Harding as Sara, and directed by Jodie Foster. "Crocodile" is about the consequences of a hit-and-run, starring Andrea Riseborough as Mia. " Hang the DJ " is a love story between Amy, played by Georgina Campbell, and Frank, played by Joe Cole, centred around an artificial intelligence that selects people's partners for them. "Metalhead" is a black-and-white apocalypse episode starring Maxine Peake as Bella, a woman trying to escape a robotic "dog", and directed by David Slade. "Black Museum" is an anthology of three stories, one of which was written by the magician Penn Jillette. Focused around a crime museum, the episode stars Douglas Hodge as Rolo Haynes and Letitia Wright as Nish.: 225–309
  
  According to Engadget and Gizmodo, as a means of viral marketing Netflix sent private messages to users of the Turkish website Ekşi Sözlük. The messages were sent from the account "iamwaldo" and read, "We know what you're up to. Watch and see what we will do." Although the advertising was met with positive reception from some users, others were concerned by distress that the messages may have caused.