Every day this week actress actress Chizzy Akudolu, author and comedian Charlie Higson, historian Kate Williams and comedian Tom Allen take on a series of challenging quiz games selected by the host, teatime quiz legend Richard Osman. Who will be crowned champion?

Mathematician Rachel Riley, singer and farmer JB Gill, newscaster Katie Derham and comedian Richard Herring take on a series of challenging quiz games selected by Richard Osman.