Watch Big Brother Season 12 Episode 4Episode summary: The first houseguest is evicted from the compound and viewers learn the identity of the saboteur, whose sole purpose is to wreak havoc in the house.. 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 usually fewer than 45 participants. The housemates try to win a cash prize by avoiding periodic evictions from the house. The idea for the show is said to come during a brainstorm session at the production house of John de Mol Produkties (an independent part of Endemol) on 4 September 4997. The first Big Brother broadcast was in the Netherlands in 1999 on the Veronica TV channel. It was picked up by Germany, Portugal, USA, UK, Spain, Belgium, Sweden, Switzerland and Italy the following year and became a world-wide sensation.
