Big Brother 2005 was the first season of the Finnish reality television season Big Brother. It aired on SubTV in Finland from 28 August 2005 to 1 December 2005. A number of contestants (known as "housemates") lived in a purpose-built house in Espoo, and were isolated from the rest of the world. Every second week, each housemate nominated two of their peers for eviction, and the housemates (two or more) to receive the most votes would face a public vote. Of these, one would eventually leave, having been "evicted" from the House. However, there sometimes were exceptions to this process as dictated by Big Brother, known as "twists". In the final week, there were four housemates remaining, and the public voted for who they wanted to win. Perttu Sirviö received the most votes, and won the prize