Jimmy Carr, Jon Richardson and special guest captain Lee Mack are joined by celebrity guests Bob Mortimer and Adam Hills. Countdown regular Susie Dent is in with help from Alex Horne and the Horne Section while Rachel Riley, provides the letters and numbers with a little help from Joe Wilkinson. Jon and Adam won, 153 points to 0 - the lowest and only ever zero score on Countdown, and the highest ever score.