In the fourth season of Big Brother, the American reality TV show, aired thirty-three episodes during the summer of 2003 from July 8 to September 24.

The big twist for the year was The X-Factor. Eight HouseGuests were introduced, only to have five HouseGuests' exes compete against them in the game. This quickly became messy, as Scott, a HouseGuest who had his ex-girlfriend move into the house, had a violent outburst, and subsequently told the house that he had a sexually transmitted disease. He was disqualified and evicted from the game.



List of ex-couples

Alison Irwin	Justin Giovinco
Scott Weintraub	Amanda Craig
David Lane	Michelle Maradie
Erika Landin	Robert Roman
Jun Song	Jee Choe Golden Power of Veto Another twist, introduced in the last veto contest of Big Brother 3, was the Golden Power of Veto, in that if a nominated person won such a veto, they would be allowed to take themselves off consideration for voting, which was not allowed when the veto was introduced originally the year before. Event ordering Yet another twist in the game occurred when Jun won HoH in Week 8 of the competition. The Veto competition would be held before Jun would make her nominations. The reason being was that Jun, as HoH, won a special trip outside of the Big Brother house to attend the 20th Annual MTV Video Music Awards. Her disappearance (as she entered the Diary Room and never returned) played a part in the Veto Competition, as the houseguests had to guess where Jun was. Jun returned, and nominated Jee, her ex-boyfriend, and Alison. However, Alison won the Veto, and used it on herself, forcing Jun to put Robert in her place. Despite Robert being a replacement for Alison, Jee was unanimously evicted 2-0. JuryOne last twist to the format included a jury of seven who would decide the outcome of the game. When the game got down to nine players, the evictees formed the jury. The jury format eliminated America's need to break a tie if necessary, as done before in Season 3 (though Lisa won 9-1). The sequestered jury was introduced after many outcry among fans when Danielle lost season 3 arguably due to evicted houseguests seeing her diary room sessions. From season 4 on, the sequestered jury saw only competitions and evictions. Memorable Events This season featured the first act of sex between houseguests on the show when contestants Amanda and David had sex under the covers in the Head of Household room. The DVD that was released featured uncensored moments from the season that weren't allowed for broadcast, including this encounter. For the second time in four seasons, a Big Brother houseguest was removed from the show when Scott was evicted for an angry rampage which included throwing furniture and which frightened some of the houseguests. Contestant Michelle, at age 19, was and remains (as of Season 8), the youngest houseguest in the show's history.