Bigg Boss 5 was the fifth season of the Indian reality TV show Bigg Boss, which aired on Colors from 2 October 2011 to 7 January 2012 with Sanjay Dutt as the host.Salman Khan hosted the opening, the Diwali special episode and a few eviction episodes along with Sanjay Dutt after which Sanjay took over as the permanent host of the season.
The series was won by soap actress and television presenter Juhi Parmar on 7 January 2012.
During the launch on 2 October, fourteen hand-picked housemates entered the house located in Karjat, a town, about halfway between Mumbai and Pune in the Indian state of Maharashtra. Four additional wild card entries were made during the second, third, fourth and the end of seventh week taking the number of contestants to eighteen. Three guest entries, who stayed in the house for a couple of days, took the total number of inhabitants to twenty one. The housemates, considered strangers for each other, spent 98 days (14 weeks) locked out together under the supervision of 55 cameras fitted around the house. It is considered as the most controversial Bigg Boss Season.
Opening episode was aired on 2 October 2011 presented by Salman Khan and Sanjay Dutt. This extravagant introductory episode to the season 5 showcased different features of Bigg Boss house and introduced each of the participant. It also featured Bollywood actors Ajay Devgn for the promo of their upcoming film Rascals and Samir Soni for promoting his new serial Parichay on Colors.
According to data available with aMap, a television viewership monitoring agency, the opening episode of Bigg Boss 5 on Colors got a rating of 4.3. Season 4 had an average rating of 3.6. Season 3 had average rating of 2.43 while Bigg Boss 2 and Bigg Boss 1 had average ratings of 2.03 and 1.96 .
After Pooja Misrra's unexpected exit, Bigg Boss 5 started to lose its sky scraping viewership in less than a week. In India, many fans who were supporters of the newly renowned Pooja M., who was mercilessly bullied throughout the show, stopped watching since she was shown the doors. Many others stopped watching because of Sky and Siddharth's indecent display of manners towards the female inhabitants and also due to the continuous favoritism by the Bigg Boss who had always showed a lenient attitude towards the male contestants. As a result, Bigg Boss 5 got a marked decline in its TRP ratings which fell drastically after the Aapka Farmaan episode aired on 26 November 2011. According to some TRP sites, BB5 had reached 0.69 at one point. The Undekha Act was not in top 100.