San Junipero is an episode.
`` San Junipero '' is the fourth episode of the third series of British science fiction anthology series Black Mirror . Written by series creator and showrunner Charlie Brooker and directed by Owen Harris , it premiered on Netflix on 21 October 2016 , together with the rest of series three . The episode , set in 1987 in a beach resort town named San Junipero , tells the story of Yorkie ( Mackenzie Davis ) , a shy young woman visiting the town and falling in love with a regular visitor , Kelly ( Gugu Mbatha-Raw ) . It received critical acclaim , with many calling it the best episode of series three and for being more cheerful and positive than other Black Mirror episodes .