A special celebrity experts edition of the general knowledge quiz in which four teams try to come up with the answers that no one else could think of.

Presented by Alexander Armstrong and co-host Richard Osman. Featuring Kieran Long and Piers Taylor, Martin Roberts and Amanda Lamb, Vicki Butler-Henderson and Tiff Needell, and John Hammond and Laura Tobin.

A TV experts edition of the general knowledge quiz with Michael Fish, Carrie Grant, David Grant, Adam Hart-Davis, Mary-Ann Ochota, Martin Roberts, Charlie Ross, Catherine Southon.

Featuring Matthew Wright, Rav Wilding, Paul Martin, Holly Hamilton, Mark Lane, Janet Street-Porter, Martin Roberts and Fee Mak.