Jimmy Carr returns with Sean Lock and Jon Richardson, who are joined by Jonathan Ross and Roisin Conaty. David O'Doherty joins Susie Dent in Dictionary Corner, and Joe Wilkinson 'helps' Rachel Riley.

Guests are Freddie Flintoff and Rhod Gilbert. Henning Wehn joins Susie Dent in Dictionary Corner, while Joe Wilkinson 'helps' Rachel Riley provide the letters and numbers.

Jimmy Carr and team captains Sean Lock and Jon Richardson are joined by Josie Long and Rob Beckett. Vic Reeves joins Susie Dent in Dictionary Corner, while Joe Wilkinson 'helps' Rachel Riley.

Jimmy Carr hosts the comedy panel show's version of the famous quiz, with team captains Sean Lock and Jon Richardson joined by guests Jason Manford and Stephen Mangan. Countdown regular Susie Dent is in Dictionary Corner with Tim Key, while maths expert Rachel Riley provides the letters and numbers with a little `help' from Joe Wilkinson

Jimmy Carr hosts, alongside team captains Sean Lock and Jon Richardson, who are joined by Jo Brand and Claudia Winkleman. Bill Bailey joins Susie Dent in Dictionary Corner, while Joe Wilkinson 'helps' Rachel Riley provide the letters and numbers.

Jimmy Carr hosts, alongside team captains Sean Lock and Jon Richardson, who are joined by Bill Bailey and Josh Widdicombe. Jake Yapp joins Susie Dent in Dictionary Corner, while Joe Wilkinson 'helps' Rachel Riley provide the letters and numbers.

Jimmy Carr hosts the Cats/Countdown mash-up, with Sean Lock, Jon Richardson, Bob Mortimer and Richard Osman. Matthew Crosby joins Susie Dent in Dictionary Corner, and Joe Wilkinson 'helps' Rachel.

Jimmy Carr hosts while Jon Richardson and David O'Doherty take on guest captain Johnny Vegas and Jamie Laing. Holly Walsh is in Dictionary Corner.

Jimmy Carr hosts while Jon Richardson and Michelle Wolf take on guest captain Jonathan Ross and Johnny Vegas, Pappy's is in Dictionary Corner

Jimmy Carr hosts, and it's Jon Richardson and Chris Addison against Joe Wilkinson and Katherine Ryan, with David O'Doherty in Dictionary Corner.

Jimmy Carr hosts as Jon Richardson and Joe Wilkinson take on guest captain Kevin Bridges and Jessica Knappett. With Dr John Cooper Clark in Dictionary Corner.

Jimmy Carr hosts as Lee Mack and Victoria Coren Mitchell take on Alan Carr and Dane Baptiste, Sam Simmons is in Dictionary Corner with Susie Dent and Rachel Riley

Jimmy Carr hosts as Alan Carr and Josh Widdicombe take on Joe Wilkinson and Sara Pascoe. Bill Bailey is in Dictionary Corner with Susie Dent, and Rachel Riley.

Jimmy Carr hosts as Johnny Vegas and Rhod Gilbert take on Joe Wilkinson and Roisin Conaty, Tom Allen is in Dictionary Corner

Katherine Ryan hosts a special, celebrating 100 years of women's suffrage. Roisin Conaty and Jessica Hynes go against Sara Pascoe and Lolly Adefope. Also featuring Morgana Robinson, Susie and Rachel.

Jimmy Carr hosts with Sean Lock and Katherine Ryan who take on Jon Richardson and Joe Wilkinson in the classic words and number quiz. Dr John Cooper Clark in Dictionary Corner with Susie Dent and Rachel Riley looks after the numbers.

Jimmy Carr hosts as Sean Lock and Miles Jupp v guest captain Alan Carr and Roisin Conaty. Ivan Brackenbury joins Susie in Dictionary Corner.

Jimmy Carr hosts as Sean Lock and Rob Beckett take on Jon Richardson and Claudia Winkleman. Plus special guests Nick Mohammed and Joe Wilkinson.

Jimmy Carr hosts as Sean Lock and Phil Wang take on guest captain Alan Carr and Harriet Kemsley. Plus special guests David O'Doherty and Joe Wilkinson.

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.

Sean Lock and Kevin Bridges take on Joe Wilkinson and Victoria Coren Mitchell. Adam Kay joins Susie Dent in Dictionary Corner.

Jimmy Carr hosts the final in the current series. Sean Lock and Roisin Conaty take on guest captain Alan Carr and Joe Lycett. Plus guest Spencer Jones in Dictionary Corner.

Jimmy Carr hosts as Sean Lock and Kerry Godliman take on Jon Richardson and Joe Wilkinson. With Susie Dent, Rachel Riley and Dictionary Corner guest Mr Swallow, aka Nick Mohammed.

Jimmy Carr hosts as Jon Richardson and Tom Allen take on Sean Lock and Rosie Jones. With guest Adam Riches as Sean Bean, plus experts Susie Dent and Rachel Riley.

Jimmy Carr hosts as Sean Lock and Daisy May Cooper take on Richard Ayoade and Ivo Graham. Adam Buxton joins Susie Dent in Dictionary Corner and Joe Wilkinson assists Rachel Riley.