7/70 Jeremy Vine hosts a general knowledge quiz featuring the UK's top quiz champions.
5/8 With Alun Cochrane, Tony Hawks, Josie Lawrence and Paul Merton. Nicholas Parsons hosts.
BBC Radio 4
32/37 The pressure is increasing as the quarter-finals continue.
Two teams of clever celebrities put their reputations on the line in the name of charity.
4/8 With Sheila Hancock, Graham Norton, Paul Merton and Robin Ince. Nicholas Parsons hosts.
BBC Radio 4 Extra
1/6 James Walton quizzes Sebastian Faulks, John Walsh, Sir Andrew Motion and Sue Limb.
Nick Knowles challenges contestants to achieve perfection and win £1,000.
The warriors test their strength at Ring Rack and use their knowledge at Roman Road. (R)
12/26 Gildar's vanity rubs his fellow Defenders the wrong way in the moat. (R)
31/32 Tim Wonnacott visits Clandon Park in Surrey. (R)