A sporting celebrity special edition of the quiz, with Phil Tufnell and Martin Offiah.

A special Doctor Who edition of the quiz, with guests including Sylvester McCoy.

Jean Boht, Craig Charles, Nick Conway, Jennifer Gibney, Jeffrey Holland, Danny John-Jules, Brendan O'Carroll, Su Pollard, Shen Xiaojing

Radio DJs and presenters including Scott Mills and Anneka Rice take part in the quiz.

Top chefs Rachel Allen, Jean Christophe Novelli, Paul Rankin and Rustie Lee take part.

Christopher Biggins, Natalie Cassidy, Ricky Groves, Tammy Jung, John Noakes, Jessica Pardoe, James Phelps, Oliver Phelps, Peter Purves, Janet Street-Porter