Nosedive is the first episode of Black Mirror's third series, released on Netflix in 2016, and follows Lacie Pound in a world where every interaction is rated from one to five stars. A one-star rating is the harshest judgement in that system, instantly damaging a person's score and social standing. Clips of the episode circulated widely as the show's satire of social media became a cultural shorthand, and the single-star sound is now reused online whenever someone wants to deliver a quick, recognisable verdict on a bad performance, product, or decision.