Big Brother 15

Big Brother 15 features 10 new housemates and six returning housemates from previous series, all getting a second chance to win the grand prize.

Secrets
Also new to Big Brother 15, every housemate will enter the BBT house with a secret. Should a housemate discover another housemate's secret, the housemate whose secret was discovered will automatically be nominated for eviction by Big Brother. If a housemate reveals their secret to another housemate, they will be automatically nominated for eviction. Every day, Big Brother asks the housemates if they would like to make an assumption concerning another housemate's secret. If they are correct, the housemate whose secret was discovered is automatically nominated. If they are incorrect, they are the one who is nominated.

Nomination History
Nominations in Big Brother 15 follow a different formula than is typical of the Big Brother Tabloid franchise. Each week, the housemates alternate nominations: male housemates nominate female housemates one week, and female housemates nominate male housemates the following week. In some weeks housemates are only permitted to nominate one housemate, rather than the typical two; this, usually occurs when at least one housemate has been already nominated by Big Brother. Also, during some weeks, a twist occurs, which affects the nomination procedure.


 * Varvara discovered Gabriel's secret on Day 9. As a result, he automatically faced eviction.
 * Big Brother awarded Bertha immunity from Week 3's nominations. Any nominations against her did not count.
 * Stephanie discovered Alison's secret on Day 23. Because it was a male nomination week, she was punished severely instead of being nominated.
 * Varvara discovered Frank's secret on Day 24 after several failed attempts. As a result, he automatically faced eviction. The girls were asked to nominate one male instead of two.