Jimmy Carr hosts an edition packed with festive surprises. Countdown regulars Susie Dent and Rachel Riley are on hand to help maintain order as Jon Richardson and Sarah Millican take on Lee Mack and Jason Manford. They are joined by guests Nick Mohammed and Joe Wilkinson.

Jon Richardson and Joe Wilkinson take on Lee Mack and Katherine Ryan in the comedy words-and-numbers game, while The Brett Domino Trio join Susie Dent in Dictionary Corner. Hosted by Jimmy Carr, with Rachel Riley looking after the numbers and letters.

Jimmy Carr hosts the game show mash-up, with Rachel Riley and Susie Dent. Jon Richardson and Lucy Beaumont take on Roisin Conaty and Joe Wilkinson in the comedy words-and-numbers game, while Bec Hill joins Susie Dent in Dictionary Corner.

Jimmy Carr hosts the game show mash-up, with Rachel Riley and Susie Dent. Jon Richardson and Sara Pascoe take on Sean Lock and Richard Ayoade. Nick Helm joins Susie in Dictionary Corner.

Sean Lock and Harriet Kemsley take on Jon Richardson and Joe Lycett in the words-and-numbers game, while Mat Ewins joins Susie Dent in Dictionary Corner.

Jimmy Carr hosts the game of words and numbers, with Rachel Riley and Susie Dent. Sean Lock and Paul Foot play against Jon Richardson and Angela Barnes while John Cooper Clarke joins Susie in Dictionary Corner.

Katherine Ryan and Joe Lycett take on Johnny Vegas and Sean Lock in the words-and-numbers game, while would-be novelist Christopher Bliss joins Susie Dent in Dictionary Corner. Hosted by Jimmy Carr with Rachel Riley looking after the numbers and letters.