"Arkangel" is the second episode of the fourth series of the British science fiction anthology series Black Mirror. Written by series creator and showrunner Charlie Brooker and directed by Jodie Foster, it premiered on Netflix on 29 December 2017, along with the rest of series four. In the episode, the single mother Marie (Rosemarie DeWitt) enrols her daughter Sara in a trial of Arkangel, an implanted technology which allows Marie to track Sara's location, current vision and hearing, and automatically censors distressing material. The main theme of the episode is helicopter parenting; as a woman raised by a single mother, Foster had many views which influenced the script, such as a more complex characterisation of Marie, and was given control of casting. For the filming in November 2016, Foster chose a location in Canada to represent working-class America. Differently-aged versions of Sara are played by different actors, with Brenna Harding playing her as a teenager. One scene incorrectly portrays an emergency contraception (EC) pill as causing abortion rather than preventing pregnancy. Critics...