The final episode in our countdown is from Big Brother 2. Romance unfolds between Helen and Paul - and Helen tells us how much she likes Blinking. 

Davina and Rylan relive one of Big Brother's simplest yet most entertaining tasks. Which BB6 housemate can stay in a cardboard box for the longest?

From Ivana Trump entering the house to Alex Reid destroying a snowman at the command of a persuasive talking tree - it could only be CBB7. 

In BB3, which kicked off the careers of Alison Hammond, Kate Lawler and the late Jade Goody, the action builds to a shock twist: the house is split into rich and poor sections. 

This episode re-joins the action in the CBB4 house to hear George Galloway utter those eternal words to Rula Lenska: 'Would you like me to be the cat?'

Davina and Rylan remember the moment when Jackie Stallone made a shock entrance to the Celebrity Big Brother house with her now iconic catchphrase. 

Davina and Rylan relive the unforgettable duet between Ulrika Jonsson and Verne Troyer during a task in Celebrity Big Brother 6. 

Davina and Rylan remember Nikki Grahame's Diary Room rant in Big Brother 7, one of the most iconic and often-quoted Big Brother moments of all time. 

Davina and Rylan relive Celebrity Big Brother 4, when secret civilian Chantelle Houghton went into the house pretending to be a celeb!

Davina McCall, Rylan Clark-Neal and special guests relive the first ever series and the dramatic moment that made Big Brother an icon.