California Doubling: Inverted. The only Black Mirror episodes filmed where they take place are the ones set in the UK; Brooker says he has a policy of filming the US-based episodes in other countries because the cost of US location filming is just too high for a UK-based production.
Celebrity Paradox: The first episode mentions Downton Abbey — many actors from that show (including two of the main cast) appear in large roles in Black Mirror. One of them, Allen Leech, even appears in that very episode.
Channel Hop: The series began on UK tv station Channel 4, airing Series 1, 2 and White Christmas, before the show was bought by Netflix to be one of their full original shows.
Promoted Fanboy: Butcher Billy created fan art of the show that became popular online before Netflix hired him, putting his artwork on the cover of the San Junipero album, and in the episode Black Museum, as well as having him do more original work for the episode USS Callister. He even tweeted about it. He creates art for use in other Netflix shows now, and has a pretty healthy following from it all through Black Mirror.
In 2017, Brooker announced a series of Black Mirror novels featuring original new stories edited by Brooker, with Black Mirror: Volume 1 being scheduled for release on February 2018, featuring Cory Doctorow, Claire North, and Sylvain Neuvel as confirmed writers, along with two more promised volumes between 2018 and 2019. However, the release date for Volume 1 came and went with nothing, and when later pressed on the issue, Brooker and co-producer Annabel Jones confirmed that they were scrapped.
In June of 2023, Brooker stated that he used ChatGPT to generate an episode of Black Mirror for Season 6, but after realizing the program just took a bunch of existing Black Mirror episode synopsis and mashed them together, threw out what it wrote.
Hannah John-Kamen plays Selma from "Fifteen Million Merits" and a larger role as Sonja from "Playtest."
Michaela Coel plays the airport lady in “Nosedive” and has a larger role as Lowry in "USS Callister".
Daniel Lapaine has a small role as Max in "The Entire History of You" and a larger role as Dawson in "Black Museum."
Asim Chaudry appeared as an extra in "The Waldo Moment", and has a larger role as Thakur in "Bandersnatch".
Aaron Paul made a Voice-Only Cameo as a gamer who harasses the main characters at the end of "USS Callister" before appearing as one of the protagonists in "Beyond the Sea".
Anjana Vasan played a Sea of Tranquility cosplayer in "Nosedive" and main character Nida in "Demon 79".