Big Brother 2, the second season of the American reality series, premiered on CBS on July 5, 2001, and completely revamped the format to emphasize competition over the social experiment of the first season. Twelve strangers lived in an isolated house under constant surveillance, competing weekly for the title of Head of Household, who would nominate two houseguests for eviction, with the remaining players voting one out. The season concluded on September 20, 2001, after 82 days, with Dr. Will Kirby winning the $500,000 grand prize and Nicole Nilson Schaffrich finishing as the runner-up. The game featured twists like food competitions that forced losers to eat only peanut butter and jelly (a precursor to the "Have-Not" twist), and the final decision was made by the previously evicted houseguests. Throughout the season, players were completely cut off from the outside world, communicating only in the Diary Room, making it a compelling social experiment.