Bigg Boss 4 is the fourth season of Indian reality TV show Bigg Boss, which aired on Colors TV from 3 October 2010. This season was longer than its predecessor, Bigg Boss 3 and lasted for 14 weeks (97 days) ending on 8 January 2011. Salman Khan joined the show for the first time as host and has subsequently hosted all the following seasons. This season became the highest-rated season with the finale TRP reaching 6.2 and the average TRP being 4.8.
During the launch on 3 October, fourteen hand-picked housemates entered the house located in Lonavala, a hill station, about 100 kilometres east of Mumbai in the Indian state of Maharashtra. Two additional wild card entries were made during the second and third weeks, taking the number of contestants to sixteen. The housemates, considered strangers to each other, spent 96 days (14 weeks) locked up together under the supervision of 32 cameras fitted around the house. Four of the housemates, Ashmit Patel, Dolly Bindra, The Great Khali and Shweta Tiwari, reached the final week, facing public vote. The show ended on 8 January 2011 with the grand finale. Shweta Tiwari emerged as the winner, going away with a prize money of 10 million, while The Great Khali was announced as the runner-up.
The season was announced in June 2010 by the makers and channel. Amitabh Bachchan, who presented the third season announced his departure from the show. Shahrukh Khan was first offered to host the series but he rejected it and was later replaced by Salman Khan. The final list of contestants was revealed on 2 October 2010.
The series was broadcast on Colors TV for the second time. Salman Khan presented the show on the weekends where a segment called 'Bigg Boss - Aapka Farmaan' was introduced and broadcast every Friday (eviction night) and Saturday. The finale was aired on 8 January 2011.
In July 2010, Sara Khan was roped in as the first housemate to enter. Khan quit her show Sapna Babul Ka... Bidaai to be a part of the series. In September 2010, Shweta Tiwari was roped in as the second housemate.
In September 2010, Kelly Brook rejected the show and was replaced by Veena Malik, who was confirmed last minute. Neetu Chandra, Shoaib Akhtar and Sania Mirza had also rejected the series as well.
Wrestler The Great Khali was roped in as the first wild card entrant in October 2010. In November 2010, Pamela Anderson entered the show as a guest which spiked the rating up high.
The eye logo was revealed in September 2010 with colours contrasting of white, black and turquoise.
The house images were revealed in September 2010 with a big garden, dining area, living area, confession room and bedroom.
In September 2010, a promo featuring Salman Khan was released. The music video promo of Bigg Boss 4 was later released in mid September 2010.
Throughout the series various guests may appear from time to time for a visit.
The main events in the house are summarised in the table below. A typical week began with nominations, followed by the shopping task, and then the eviction of a housemate during the Saturday episode. Evictions, tasks, and other events for a particular week are noted in order of sequence.
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Bigg Boss 4, a mobile video game based on the fourth season was released by Indiagames.