"Demon 79" is the fifth and final episode of the sixth series of the British science fiction anthology series Black Mirror. It was written by series creator Charlie Brooker and Bisha K. Ali, and directed by Toby Haynes. Alongside the rest of the sixth series, it premiered on Netflix on 15 June 2023. It stars Nida, a mild-mannered sales assistant who accidentally releases the demon Gaap, whom only she can see. Gaap tells her she must commit three murders to prevent the end of the world.