<P> The second spin - off, Celebrity Big Brother, is set to air in the winter of 2018 on CBS . </P> <P> Though not an actual spin - off, the Canadian edition of the series is the first and currently only series to adopt the American format of Big Brother . </P> <P> Big Brother is a game show in which a group of contestants, referred to as HouseGuests, live in a custom - built "house" (actually a set built on a CBS stage in Los Angeles, Stage 18 in recent editions), constantly under video surveillance . While in the house, the contestants are completely isolated from the outside world, meaning no phone, television, internet, magazines, newspaper, or contact with those not in the house . This rule could be broken, however, in the event of a medical injury, a family emergency or death . The format of the series is mainly seen as a social experiment, and requires HouseGuests to interact with others who may have differing ideals, beliefs, and prejudices . While a competition, the series allows viewers to witness the relationships formed in the house and the behavior of the HouseGuests . Though locked in the house, the HouseGuests are free to quit the game, though will not be allowed entry back into the house . Should a HouseGuest break the rules of the game, they could be expelled from the house, and unable to return . The contestants compete for a grand prize of $500,000 . </P> <P> The premiere season used the original format of the series, which originated in the Netherlands . HouseGuests were required to nominate two of their fellow contestants for potential banishment, and the two with the most votes would be nominated . Should multiple HouseGuests receive the most nominations, then more than two HouseGuests were marked for banishment . This process was mandatory for all HouseGuests, and failure to comply could result in expulsion from the house . The HouseGuests in these seasons were forbidden from discussing nominations, and doing so could result in punishment . The public, through a vote conducted by phone, would vote to banish one of the nominated HouseGuests from the house, and the HouseGuest with the most votes from the viewers would be banished from the house . When only three HouseGuests remained, the viewers would vote for which of them should win the series, and the HouseGuest with the most votes would become the winner . The format, during that season, was plagued with a negative reception from both critics and viewers . </P>

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