Shaun Keaveny, Mark Watson, Bunny Campione, Frank Cottrell

Another four famous faces risk their reputations on television's toughest quiz. BBC Radio 6 Music presenter Shaun Keaveny, comedian Mark Watson, Antiques Roadshow expert Bunny Campione and the writer of the 2012 Olympic Opening Ceremony, Frank Cottrell Boyce answer questions on Led Zeppelin, the Canterbury Tales, Stewart Granger and Oliver Postgate.