7/18 Stephen Fry muddles through with Aisling Bea, Danny Bhoy, Jimmy Carr and Alan Davies.
Jeremy Vine hosts a general knowledge quiz featuring the UK's top quiz champions.
3/30 Subjects include beekeeping and the Royal Navy in the Second World War.
8/12 The battle for the last two places in the semi-finals reaches its climax.
2/13 With guests James Acaster, Dane Baptiste, Rob Beckett, Ed Byrne and Holly Walsh.
7/12 The final five celebrities are welcomed to the challenge as the last heat gets underway.
3/37 Three fans of PG Wodehouse square up to a team of wordsmiths.
3/37 Students from the University of Liverpool battle it out with the University of Warwick.