Jimmy Carr hosts the comedy panel show's version of the famous quiz, with team captains Sean Lock and Jon Richardson joined by guests Vic Reeves and Jo Brand. Countdown regular Susie Dent is in Dictionary Corner with Adam Buxton, maths expert Rachel Riley looks after the letters and numbers, and there's a special appearance by Rob Beckett.

Jimmy Carr hosts as Sean Lock and Roisin Conaty go up against Jon Richardson and Nish Kumar. Adam Buxton joins Susie Dent in Dictionary Corner, with Rachel Riley.