The show followed thirteen contestants, known as housemates, who were isolated from the outside world for an extended period of time in a custom built House.

The last remaining housemate, Cameron Stout, was declared the winner, winning a cash prize of £70,000.

Others included another hill figure, approximately half the size of that at Uffington, being placed next to Urquhart Castle, Loch Ness, Scotland, which appeared from 3–5 May, alongside a crop circle in a secret location in Southern England and as a depiction on a beach in Kidwelly, Wales.

The contestants were recorded 24 hours a day[7] with cameras fixed around the house, and the wearing of portable microphones mandatory.

The Big Brother house has been located at Elstree Studios, Borehamwood, Hertfordshire since the third series of the show.

The Diary Room featured a soft pink coloured background and contained a large blue chair.

This series introduced the Rewards Room, where the winning housemates of the weekly live task were invited and were often thrown a party.

This series was also the first to allow previously evicted housemates to return, with ex-housemate Jon entering the house for a second time on Day 50.

Housemates from Big Brother 4 failed to make many appearances in future regular series' since their evictions.

On Day 43, a sniffer dog found a suspect package near to the house and directly near the stage where Davina McCall interviewed evicted housemates.

Production staff and a camera crew entered the house, made them aware of the security alert and evacuated them.

At 21:35, Marcus Bentley informed the viewers that the Big Brother gallery, where the production crew monitored the house, also had to be evacuated, all filming was required to stop and as a result, cameras were turned off and all filming of the housemates in the secure area wasn't permitted, however they were still required to follow the rules of the show.

A 100-metre cordon was put into force around the house by police where the press and audience were required to wait for their safety.

Bomb disposal police carried out a controlled explosion of the suspect package around 22:00 and turned out to be a false alarm.

Two live shows at 20:30 and 22:00, where a housemate was due to be evicted, were cancelled by Channel 4 at short notice and instead, an episode of Friends was broadcast in its place.