Alexander Armstrong and Richard Osman present a special celebrity academic edition of the general knowledge quiz in which four teams try to come up with the answers that no-one else could think of. Featuring Clemency Burton-Hill and Graeme Garden, Dan Snow and Susie Dent, Robert Peston and Steph McGovern, and Michael Mosley and Germaine Greer.

Alexander Armstrong and Richard Osman present a special celebrity 1980s edition of the quiz that rewards the answers that no-one else could think of. Featuring Stephanie Beacham and Emma Samms, Anne Diamond and Rustie Lee, Denise Pearson and Stedman Pearson, and Tessa Sanderson and Willie Thorne.