Vic Reeves and Aisling Bea join host Jimmy Carr and team captains Sean Lock and Jon Richardson for more comic innuendos, unpredictable conundrums and unforgivable puns in the comedy quiz. David O'Doherty is with Countdown's resident lexicographer Susie Dent in Dictionary Corner, while Rachel Riley looks after the numbers and letters.

Jimmy Carr, Sean Lock and Jon Richardson are joined by Bob Mortimer and Holly Walsh for more comic innuendos and unpredictable conundrums. Claudia Winkleman stands in for Rachel Riley on letters-and-numbers duty, while Isy Suttie is in Dictionary Corner with Susie Dent is in Dictionary Corner

Jon Richardson takes on guest captain Johnny Vegas in another round of words-and-numbers chaos. Their team-mates are Alex Brooker and Sara Pascoe, while Claudia Winkleman and Rob Beckett stand in for Rachel Riley on letters-and-numbers duty, and Tom Allen is in Dictionary Corner with Susie Dent. Hosted by Jimmy Carr

Jon Richardson and Sean Lock face off once again in another unpredictable battle of words and numbers, with help from Kevin Bridges and Rebecca Front. Rachel Riley is back on maths-and-letters duty after her fortnight off, and Joe Lycett is in Dictionary Corner with Susie Dent

Jimmy Carr hosts another round of light-hearted words-and-numbers fun, with Sean Lock and Katherine Ryan taking on Jon Richardson and David Mitchell. Nick Helm is in Dictionary Corner with Susie Dent, while Rachel Riley does the adding up