Big Brother (2000) : 5x23

On the night June 16th 2004, Day 20 of the fifth season of Big Brother UK, an argument broke out on a scale never before witnessed in the reality show. This episode, especially extended to one hour, airs the brawl itself and the events of Day 20 that lead to such a colossal disaster for the housemate's relationships. During the day, tempers within the house were already reaching boiling point. Irritated by his constant cold showers (which Emma and Michelle set up), Victor rants inside the Diary Room, but getting no response takes to the roof to protest. Vanessa makes a fatal mistake when she tells Dan and Shell how she doesn't respect Michelle and that her opinions do not matter, unaware that the 'evictee' she is talking about is watching and listening to it all. By the time the two 'evicted' contestants return at around 10.45pm, the atmosphere in the house is at it's most explosive yet. Annoyed by the girls' return, Victor and Jason retreat to the garden to lick their wounds.