"Big Brother 1" featured some twists to the format throughout the course of the season. On Day 36, Housemates Anita and Rachel entered the house as intruders. Though they were official Housemates, they learned that they were automatically nominated for eviction. Their fellow Housemates then decided which of the two should be evicted from the house, and the Housemate with the most votes was then evicted. The survivor of the eviction was then given immunity from the following round of nominations. Yet another twist in the format occurred on Day 84, only a day before the season finale, when the Housemate who had come in third place was evicted from the house. The finale occurred on the final day, with only two of the three finalists remaining in the house.