Jimmy Carr hosts the comedy words-and-numbers quiz as Roisin Conaty and Joe Wilkinson take on Jon Richardson and Nabil Abdulrashid. Regular Countdown mathematician Rachel Riley and lexicographer Susie Dent are on hand to adjudicate, aided by David O'Doherty in Dictionary Corner.

Jimmy Carr hosts a combination of the comedy panel show and the long-running words and numbers quiz, inviting Jon Richardson and Jack Dee to take on Lee Mack and Rose Matafeo in a festive-themed edition. They're joined by guests Stevie Martin and Joe Wilkinson, and Countdown regulars Susie Dent and Rachel Riley.