Big Brother (Australian season 7)
Big Brother Australia 2007, also known as Big Brother 7, was the seventh season of the Australian reality television series "Big Brother". Episodes were broadcast on Network Ten in Australia, and the first episode aired on 22 April 2007. 
Despite a drop in ratings compared to previous series, and a number of controversies, the then "Big Brother" executive producer Kris Noble considers the year's series a success. At the end of this season's finale broadcast 30 July 2007, it was announced by host Gretel Killeen that "Big Brother" would be returning for an eighth season in 2008. In the finale Aleisha Cowcher was announced winner of "Big Brother Australia 2007". She won by the closest winning margin ever in the Australian series. The news the following day reported a margin of 51% versus 49% – a difference of 65 votes. This was the last season hosted by Gretel Killeen.
Big Brother (Australian season 10)
Big Brother Australia 2013, also known as Big Brother 10, is the tenth season of the Australian reality television series, "Big Brother". It began on 28 July 2013, with a pre-recorded launch show airing on 29 July 2013 on the Nine Network. On November 6 2013, after 101 days of competition, Tim Dormer won the competition and the $250,000 prize. It is the second season of the show to air on the network after it picked up the series in 2012, following a four-year absence. Sonia Kruger continued to host the show, with Mike Goldman continuing as narrator.