4/6 James Walton chairs the literary quiz, discussing horror master Stephen King.
BBC Radio 4 Extra
Quiz in which contestants try to score as few points as possible.
2/6 David Mitchell is joined by Arthur Smith, Jon Richardson, Susan Calman and David O'Doherty
52/70 Jeremy Vine hosts a general knowledge quiz featuring the UK's top quiz champions.
3/6 David Mitchell is joined by Lloyd Langford, Henning Wehn, Sara Pascoe and Miles Jupp.
BBC Radio 4
Mini Patel, Michael O'Hare and Tim Allen battle to represent the north east of England.
Two Cambridge colleges fight it out for a place in the next stage of the competition.
8/8 Neil Mitchison joins Mary Anne Macdonald and Mary Bremner teams up with John Carmichael. (R)
Two teams who lost their first heats return for one last chance.