We all love a good quiz. So here's a question - when did ordinary contestants turn into the pro-quizzers of today? Giving the answers are Victoria Coren Mitchell, Judith Keppel, Chris Tarrant, Mark Labbett, Nicholas Parsons and many more. Narrated by Ben Miller.

Cast:Ben Miller, Nicholas Parsons, Mark Labbett, Shaun Wallace, Chris Tarrant, Judith Keppel,

Genre:Documentary,

country:United Kingdom,

Production:BBC,