Celebrities test the depths of their general knowledge in this special edition of the quiz, with Christopher Biggins and Lesley Joseph 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, with Brian Blessed and Anthea Turner 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. Esther Rantzen, John Virgo and Edith Bowman are among the stars trying to come up with the answers no-one else could think of. Presented by Alexander Armstrong and Richard Osman.