Big Brother is a popular international reality show franchise with an American version owned by CBS.
Big Brother is a reality television show in which a group of people live together in a large house, isolated from the outside world but continuously watched by television cameras. Each series lasts for around three months, and there are 10-17 participants. The housemates try to win a cash prize by avoiding periodic evictions from the house.
While most versions of Big Brother feature evictions that are voted on by polling television audiences over the phone or the internet, the American version shifted before Big Brother 2 to play off the popularity of Survivor and changed the format to have the other house guests evict players.