Black Mirror season 6 saved some of the best actors in its ensemble for the cast of the finale episode, “Demon 79.” Set in Northern England in the titular year, “Demon 79” is a horror-styled episode of Black Mirror in which a timid sales assistant is tasked with committing unspeakable acts in order to prevent a catastrophe. Stylistically, the episode is modeled after classic Italian giallo films from legendary directors like Dario Argento. “Demon 79” is written by series creator Charlie Brooker and Ms. Marvel head writer Bisha K. Ali and directed by Toby Haynes, who previously helmed the acclaimed Black Mirror season 4 premiere episode, “USS Callister.”

As the anthology series’ profile continues to rise, the cast of every new season of Black Mirror is more star-studded than the last. From Breaking Bad’s Aaron Paul to Schitt’s Creek’s Annie Murphy to House of Cards’ Kate Mara, the cast of Black Mirror season 6 is full of huge names. The finale episode, “Demon 79,” saved some of the season’s best actors for last. The Black Mirror “Demon 79” cast includes a Laurence Olivier Award winner, a Shakespearean stage actor, and a star of the hit BBC series Last Tango in Halifax.

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Anjana Vasan As Nida

Nida looking confused in a flat in Black Mirror

Anjana Vasan leads the cast of the Black Mirror episode “Demon 79” as Nida. In 2023, Vasan won a Laurence Olivier Award for her portrayal of Stella in a production of A Streetcar Named Desire. She’s best known for her TV roles as Amina in the Channel 4 sitcom We Are Lady Parts and Pam in the thriller series Killing Eve. In films, Vasan played Sister Claire in Cyrano, Vaseem in Mogul Mowgli, and a news reporter in Spider-Man: Far From Home. Vasan also previously had a small role as a space cop in the Black Mirror season 3 premiere, “Nosedive.”

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Paapa Essiedu As Gaap

Gaap strikes a pose in Black Mirror

Gaap is played by Paapa Essiedu as part of the cast of Black Mirror's "Demon 79" episode. Essiedu earned Emmy and BAFTA nominations for his breakout performance as Arabella’s best friend, Kwame, in the widely acclaimed miniseries I May Destroy You. He also won the Ian Charleson Award in 2016 for his work in the Royal Shakespeare Company productions of Hamlet and King Lear. On the big screen, Essiedu played James in the psychological folk horror movie Men and Sergeant Campbell in the 2017 film adaptation of the Agatha Christie whodunit Murder on the Orient Express. He also played Alex Dumani in Gangs of London.

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Katherine Rose Morley As Vicky

Katherine Rose Morley in a yellow dress in Break

Katherine Rose Morley plays Vicky in the Black Mirror “Demon 79” episode cast. Morley is best known for her recurring TV roles as Ellie in 17 episodes of the comedy series Last Tango in Halifax, Emma Moxam in every episode of the thriller miniseries Thirteen, and Keeley Sanderson in six episodes of the hit drama The Syndicate, all for the BBC. She has also appeared in various short films; she played Martha in Break, Shelly in The Caravan, and an unnamed character in Gas, all in 2015.

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David Shields As Michael Smart

David Shields looking off-screen in Doctor Who

David Shields appears in the Black Mirror “Demon 79” episode cast in the role of Michael Smart. Shields is best known for playing British aristocrat Colin Tennant in the first season of the Netflix historical drama series The Crown. His other memorable TV guest roles include Ronan in Doctor Who season 11, episode 5, “The Tsuranga Conundrum,” and Nolan Sutcliffe in Doctors season 19, episode 211, “A Kind of Justice.” He also played Colonel Avery in the miniseries The Liberator, The Shep in The Bad Education Movie, and Alexander Fenton in the biopic Benediction.