Jimmy Carr hosts this edition with captain Jon Richardson and special guest captain Lee Mack who are joined by celebrity guests Bob Mortimer and Adam Hills. Countdown regular Susie Dent is in Dictionary Corner with help from Alex Horne and the Horne Section while the country's favourite boffin, Rachel Riley, provides the letters and numbers with a little help from comedian Joe Wilkinson.

Jimmy Carr hosts, with Sean Lock and Sara Pascoe taking on Jon Richardson and Josh Widdicombe. Susie Dent is joined by Alex Horne & The Horne Section in Dictionary Corner.

Jimmy Carr hosts as Sean Lock and Richard Ayoade take on Jon Richardson and Jessica Knappett. Plus special guests Alex Horne and the Horne Section.

Jimmy Carr hosts the classic words and numbers quiz as Sean Lock and Harry Hill take on Jon Richardson and Rose Matafeo, while Alex Horne joins Susie Dent in Dictionary Corner. Rachel Riley looks after the numbers and letters.