8 out of 10 cats Show Summary, Upcoming Episodes and TV Guide

Jimmy Carr hosts a hybrid of the comedy panel show and the words-and-numbers quiz, as Jon Richardson and Katherine Ryan take on Richard Ayoade and Laura Smyth. Mathematician Rachel Riley looks after the letters and numbers, while Mat Ewins joins lexicographer Susie Dent in Dictionary Corner.

Jimmy Carr hosts a hybrid of the comedy panel show and the words-and-numbers quiz, as Sarah Millican and Tom Allen take on Joe Wilkinson and Rosie Jones. Mathematician Rachel Riley looks after the letters and numbers, while Mr Swallow joins lexicographer Susie Dent in Dictionary Corner.

Jimmy Carr presents as Jon Richardson and Asim Chaudhry take on Joe Wilkinson and Roisin Conaty. Lucy Pearman is in Dictionary Corner with Susie Dent, while Rachel Riley looks after the numbers and letters.

Rob Brydon and Katherine Parkinson take on Jon Richardson and Babatunde Aléshé. Adam Buxton joins Susie in Dictionary Corner, while Joe Wilkinson helps Rachel with the numbers in his own inimitable fashion.

Jimmy Carr hosts the anarchic letters and numbers mash-up, with Countdown regulars Susie Dent and Rachel Riley. Jon Richardson and Harriet Kemsley take on Lee Mack and Munya Chawawa, while David O'Doherty joins Susie in Dictionary Corner.

Jimmy Carr, Susie Dent and Rachel Riley host a compilation of best bits from the anarchic letters and numbers game, featuring Sean Lock, Jon Richardson, Harry Hill, Bob Mortimer, Katherine Ryan, Joe Lycett, Rose Matafeo, Richard Ayoade, Chris McCausland, Miles Jupp, Lucy Beaumont, Alex Horne and Joe Wilkinson among others.

Jimmy Carr hosts the game show mash-up, as Jonathan Ross and Joe Wilkinson take on Roisin Conaty and Ahir Shah. Catherine Cohen joins Susie Dent in Dictionary Corner, while Dr Anne-Marie Imafidon looks after the numbers and letters.

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 and regular Countdown mathematician Rachel Riley and lexicographer Susie Dent are on hand to adjudicate as Jon Richardson and Jo Brand take on Joe Wilkinson and Jamali Maddix. Rachel Parris is in Dictionary Corner.

Jimmy Carr hosts a combination of the comedy panel show and the long-running words-and-numbers quiz, with Jon Richardson and Lucy Beaumont taking on Richard Ayoade and Joe Wilkinson. Regular Countdown mathematician Rachel Riley and lexicographer Susie Dent are on hand to adjudicate, alongside Dictionary Corner guest Finlay Christie.

Jimmy Carr hosts the game show mash-up, with Countdown regulars Rachel Riley and Susie Dent. Sarah Millican and Nish Kumar take on Jon Richardson and Maisie Adam. David O'Doherty is in Dictionary Corner.

Jimmy Carr hosts, as Roisin Conaty and Asim Chaudhry take on Jon Richardson and Josh Widdicombe. Bill Bailey is in Dictionary Corner. Regular Countdown mathematician Rachel Riley and lexicographer Susie Dent are on hand to adjudicate.

Jimmy Carr hosts as Roisin Conaty and Kiri Pritchard-McLean take on Jon Richardson and Rob Beckett. Comedian Huge Davies is in Dictionary Corner. Regular Countdown mathematician Rachel Riley and lexicographer Susie Dent are on hand to adjudicate.

Jimmy Carr hosts the game show mash-up, with Rachel Riley and Susie Dent. Jon Richardson and Lucy Beaumont take on Roisin Conaty and Joe Wilkinson in the comedy words-and-numbers game, while Bec Hill joins Susie Dent in Dictionary Corner.

Sean Lock and Harriet Kemsley take on Jon Richardson and Joe Lycett in the words-and-numbers game, while Mat Ewins joins Susie Dent in Dictionary Corner.

Katherine Ryan and Joe Lycett take on Johnny Vegas and Sean Lock in the words-and-numbers game, while would-be novelist Christopher Bliss joins Susie Dent in Dictionary Corner. Hosted by Jimmy Carr with Rachel Riley looking after the numbers and letters.

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.

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 Sean Lock and Kevin Bridges take on Jon Richardson and Victoria Coren Mitchell in the classic words-and-numbers quiz. Regular Countdown maths whizz Rachel Riley and words guru Susie Dent are on hand to adjudicate, with Susie joined in Dictionary Corner by Spencer Jones.

Sean Lock and Harry Hill take on Jon Richardson and Rose Matafeo, while Alex Horne and the Horne Section join Susie Dent in Dictionary Corner. Hosted by Jimmy Carr with Rachel Riley looking after the numbers and letters.

Sean Lock and Katherine Ryan take on Jon Richardson and Joe Wilkinson in the classic words-and-numbers quiz, while Adam Riches as Sean Bean joins Susie Dent in Dictionary Corner. Hosted by Jimmy Carr, with regular Countdown mathematician Rachel Riley looking after the numbers and letters.

Sean Lock and Sara Pascoe take on special guest team captain Alan Carr and Tom Allen in the classic words-and-numbers quiz, while Rosie Jones joins Susie Dent in Dictionary Corner. Hosted by Jimmy Carr, with regular Countdown mathematician Rachel Riley looking after the numbers and letters.

Sean Lock and Joe Wilkinson take on Jon Richardson and Sara Pascoe. Sam Simmons is in Dictionary Corner, while maths whizz Rachel Riley looks after the letters and numbers.

Sean Lock and Miles Jupp take on Jon Richardson and Rose Matafeo, while Vic Reeves joins Susie Dent in Dictionary Corner. Hosted by Jimmy Carr, with regular Countdown mathematician Rachel Riley looking after the numbers and letters.

Sean Lock and Michelle Wolf take on Jon Richardson and Rob Beckett in the classic words and numbers quiz. Spencer Jones joins Susie Dent in Dictionary Corner, while maths whizz Rachel Riley looks after the numbers.

Sean Lock and Joe Wilkinson take on guest captain Richard Ayoade and Aisling Bea. Plus special guest Tom Allen joins Susie Dent in Dictionary Corner, while maths whizz Rachel Riley looks after the numbers.

Sean Lock and Johnny Vegas take on guest captain Alan Carr and Lou Sanders. Plus The Brett Domino Trio join Susie Dent in Dictionary Corner, while maths whizz Rachel Riley looks after the numbers.

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

Sean Lock and Phil Wang take on guest captain Alan Carr and Harriet Kemsley in the classic words and number quiz. David O'Doherty joins Susie Dent in Dictionary Corner.

Sean Lock and Miles Jupp take on guest captain Alan Carr and Roisin Conaty in the classic words and number quiz. Ivan Brackenbury joins Susie Dent in Dictionary Corner.

Katherine Ryan guest hosts a very special all female edition celebrating 100 years of women's suffrage. Roisin Conaty and Jessica Hynes take on Sara Pascoe and Lolly Adefope in the classic words and numbers quiz. Morgana Robinson appears in character as Natalie Cassidy alongside Susie Dent in Dictionary Corner, while maths whizz Rachel Riley looks after the numbers.

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

Sean Lock and Phil Wang take on guest captain Alan Carr and Harriet Kemsley in the classic words and number quiz. David O'Doherty joins Susie Dent in Dictionary Corner.

Jimmy Carr hosts a brand new series of the words and numbers game. Alan Carr and Josh Widdicombe take on Joe Wilkinson and Sara Pascoe, while Bill Bailey is in with Susie Dent, and Rachel Riley is in charge of the letters and numbers.

Jimmy Carr hosts a brand new series of the words and numbers game. Jon Richardson and Joe Wilkinson take on guest captain Kevin Bridges and Jessica Knappett. John Cooper Clarke is in with Susie Dent and Rachel Riley is in charge of the letters and numbers.

Jimmy Carr hosts the new series of the words and numbers quiz. In this show, captain Sean Lock and Vic Reeves take on captain Jon Richardson and Sara Pascoe. David O'Doherty joins Susie Dent in Dictionary Corner, while Rachel Riley takes care of the letters and numbers.

Jimmy Carr hosts the new series of the words and numbers quiz. In this show guest captain Kathy Burke and Roisin Conaty take on guest captain Johnny Vegas and Bob Mortimer. John Cooper Clarke joins Susie Dent in Dictionary Corner, while Rachel Riley takes care of the letters and numbers.

Jimmy Carr hosts as Sean Lock and Stephen Mangan take on guest captain Richard Ayoade and Katherine Ryan, Bill Bailey is in Dictionary Corner.

Brand new edition hosted by Jimmy Carr with Jon Richardson and Jonathan Ross who take on guest captain Lee Mack and Victoria Coren Mitchell, with Jessie Cave in Dictionary Corner.

Jimmy Carr hosts a new edition of the panel/quiz show mash-up. In this episode, Jon Richardson and Joe Lycett take on Sean Lock and Michelle Wolf, with Adam Riches in Dictionary Corner.

The comedy hybrid returns. Jimmy Carr hosts, and it's Jon Richardson and James Acaster versus Lee Mack and Sarah Millican, with John Cooper Clarke in Dictionary Corner.

Jimmy Carr hosts the words and numbers quiz with Jon Richardson and David Mitchell who take on guest captain Joe Wilkinson and Roisin Conaty. Tom Allen is in Dictionary Corner.

Jimmy Carr hosts a new edition of the topical panel game with Jon Richardson and David O'Doherty who take on guest captain Johnny Vegas and Jamie Laing. Holly Walsh joins Susie Dent in Dictionary Corner, while Rachel Riley looks after the numbers and letters.

Jimmy Carr hosts a new edition of the topical panel game with Sean Lock and Stephen Mangan who take on Noel Fielding and Fay Ripley. The Brett Domino Trio are in with Susie Dent, while Rachel Riley looks after the numbers and letters.

Jimmy Carr hosts with Sean Lock and Danny Dyer vs Joe Wilkinson and Gabby Logan. David O'Doherty joins Dictionary Corner, with Susie Dent and Rachel Riley.

Guest captain Lee Mack and Bob Mortimer take on Sean Lock and Victoria Coren Mitchell. Alex Horne and the Horne Section join Dictionary Corner, with Susie Dent and Rachel Riley.

Jimmy Carr hosts a brand new episode with guest captain Lee Mack and Catherine Tate going up against Sean Lock and Miles Jupp. John Cooper Clarke joins Countdown's resident lexicographer Susie Dent in Dictionary Corner, while Rachel Riley looks after the numbers and letters.

Jimmy Carr hosts, David Mitchell and Cariad Lloyd take on Jon Richardson and Russell Howard. Sam Simmons joins Susie Dent in Dictionary Corner, while Rachel Riley flips the tiles.

Jimmy Carr returns to host a brand new episode with guest captain Claudia Winkleman and Johnny Vegas going up against Jon Richardson and Reginald D Hunter. Sara Pascoe joins Countdown's resident lexicographer Susie Dent in Dictionary Corner, while Rachel Riley looks after the numbers and letters. Joe Wilkinson will also be appearing.

Jimmy Carr returns to host a brand new episode with Sean Lock and David O'Doherty who go up against Jon Richardson and Natasia Demetriou. John Kearns joins Countdown's resident lexicographer Susie Dent in Dictionary Corner, while Rachel Riley looks after the numbers and letters.

Jimmy Carr returns to host a brand new episode with Sean Lock and Henning Wehn who go up against Jon Richardson and Victoria Coren Mitchell. Tom Allen joins Countdown's resident lexicographer Susie Dent in Dictionary Corner, while Rachel Riley looks after the numbers and letters with 'help' from Joe Wilkinson.

Katherine Ryan & David Mitchell join team captains Sean & Jon for another round of light-hearted words and numbers fun. Nick Helm assists in dictionary corner.

Jon Richardson takes on team captain Sean Lock in another round of words and numbers chaos with Rebecca Front and Kevin Bridges. Joe Lycett is in the corner with Susie Dent.

Jon Richardson takes on guest team captain Johnny Vegas in another round of words and numbers chaos with Strictly host Claudia Winkleman and comedians Tom Allen & Rob Beckett.

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.

Jimmy, Sean, Jon, Susie and Rachel are joined by Rob Beckett, Cariad Lloyd and Jamie Laing.

Katherine Ryan & David Mitchell join team captains Sean & Jon for another round of light-hearted words and numbers fun. Nick Helm assists in dictionary corner.

Jimmy, Sean, Jon, Susie and Rachel are joined by Miles Jupp, Sara Pascoe and Sam Simmons.

Jimmy, Sean, Jon, Susie and Rachel are joined by Jason Manford, Roisin Conaty and Sam Simmons.