The reality series in which contestants live together under surveillance and vote to eliminate one another is 'Big Brother'.
Contestants live in an isolated house equipped with cameras and microphones. They compete in challenges, nominate fellow housemates for eviction, and vote to remove contestants. Rules differ by country, but the format commonly includes a Head of Household, a nomination process, and a public or housemate eviction.
The format was created by Dutch television producer John de Mol and first broadcast in the Netherlands in 1999. The name refers to the watching authority in George Orwell's novel 'Nineteen Eighty-Four', although the television format is a separate work.
Different editions vary substantially. In the United States, houseguests are often evicted by fellow contestants, while some international versions use public voting. The core idea remains extended confinement, surveillance, competition, and social strategy.