The cultural juggernaut that is Big Brother UK aired its first episode 20 years ago this week as 10 housemates walked into a house in Bow, London on 14 July before the show began airing days later on 18 July.
Thanks largely in part to the devious antics of ‘Nasty’ Nick Bateman and a dining table showdown, the programme enthralled viewers and went on to establish itself in TV history.
Based on the concept created by John de Mol for Dutch television, the original “social experiment” took on a life of its own after a few years as the show and its housemates made national - and sometimes international - news, for better or worse.
The friendships, fallouts and fights over food budgets became unmissable television as Big Brother made its mark on reality TV with massive amounts of influence.
It spawned 19 civilian series and 22 celebrity versions before coming to a halt two years ago, although there is still hope among fans that it could be resurrected.
“You are live on Channel 4, please do not swear” is a phrase that undoubtedly sends shivers of excitement down millions of spines years after the end of the series - and longer still since it stopped airing on Channel 4 in 2010 - such is the influence of the show and especially its early years.
As the recent highlights series Big Brother: Best Shows Ever proved, people still can’t get enough of it and the nostalgia it holds.
But how much of the programme is inextricably bound up in your memory? Take our quiz to find out just how much you can remember about Big Brother UK.