John Humphrys puts the questions to some of the UK's cleverest celebrities. Featuring boxer Ricky Hatton, chef Tony Singh, comedian Ardal O'Hanlon and antiques expert Kate Bliss. Show more

John Humphrys puts the questions to some of the UK's cleverest celebrities. Featuring Cheryl Fergison, Stacey Dooley, Kellie Maloney and Jane Hazlegrove. Show more

John Humphrys puts the questions to some of the UK's cleverest celebrities. Featuring Radzi Chinyanganya, Badly Drawn Boy, Rebecca Root and Kriss Akabusi. Show more

John Humphrys puts the questions to some of the UK's cleverest celebrities. Featuring Tom Kerridge, Steph Houghton, Rob Delaney and Dominic Wood. Show more

John Humphrys puts the questions to some of the UK's cleverest celebrities. Featuring Vincent Franklin, Christian Malcolm, Chris Warburton and Graham Fellows. Show more

John Humphrys puts the questions to some of the UK's cleverest celebrities. Featuring Liam Fox, Jon-Allan Butterworth, Nick Helm and Kimberley Nixon. Show more

John Humphrys puts the questions to 6 Music presenter Chris Hawkins, historian Kate Williams, comedian and presenter Iain Stirling and the BBC's disability correspondent Nikki Fox. Show more

Four famous faces test their knowledge. Featuring vlogger Louise Pentland, writer and comedian Jason Cook, presenter of Escape to the Country Alistair Appleton and CBBC presenter Ben Shires.

CBeebies presenter Katy Ashworth, This Is England actor Thomas Turgoose, former jockey Mick Fitzgerald and radio presenter Shelagh Fogarty answer questions. Show more

John Humphrys puts the questions to some of the UK's cleverest celebrities. Featuring Lisa Maxwell, Gary Delaney, Simon Greenall and Conor McNamara. Show more