Overview: A special celebrity famous voices 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 Brenda Longman and John Leeson, Peter Dickson and Jon Briggs, Redd Pepper and Marcus Bentley, and Felicity Finch and Emerald O'Hanrahan.