Celebrities test the depths of their general knowledge in this special edition of the quiz. David Coulthard, Aldo Zilli and Shaun Williamson are among the stars trying to come up with the answers no-one else could think of. Presented by Alexander Armstrong and Richard Osman.

Celebrities test the depths of their general knowledge in this special edition of the quiz. Fatima Whitbread and Joe Pasquale are among the stars trying to come up with the answers no-one else could think of. Presented by Alexander Armstrong and Richard Osman.

Celebrities test the depths of their general knowledge in this special edition of the quiz. Russell Grant, Carol Smillie and Neil and Christine Hamilton are among the stars trying to come up with the answers that no-one else could think of. Presented by Alexander Armstrong and Richard Osman.