Big Brother is the original and unparalleled social experiment. For the most part, the Housemates are left to do as they please in a hyper-real environment largely unpenetrated by the outside world while everything they do is watched by cameras - and ultimately the public. On Day 1, the ten original housemates - Andrew, Anna, Caroline, Craig, Darren, Melanie, Nichola, Nick, Sada and Tom - entered the House.