The first semi-final in the current season of the quiz, with Russell Davies.
6/7 Sandi Toksvig and Jeremy Hardy are joined by Fred MacAulay and Hugo Rifkind.
6/6 John Lloyd and Dave Gorman receive exhibits as donations to their infinitely vast museum.
4/6 With panellists Andrew Maxwell, Celia Pacquola, Will Smith and Jason Solomons.
3/6 James Walton tests Sebastian Faulks, John Walsh, John O'Farrell and Alex Clark.
6/8 Nicholas Parsons hosts the popular panel game.
Russell Davies chairs the twelfth and last of the 2015 heats.
5/7 Jeremy Hardy is joined by Bob Mills, Hugo Rifking, Elis James and Samira Ahmed.
5/6 John Lloyd and Dave Gorman take exhibits from Alex Horne, Sara Wheeler and Alain De Botton
3/6 Angus Deayton plays host to Will Self, Arthur Smith, Sara Pascoe and Gyles Brandreth.