Jimmy Carr hosts a new edition of the panel/quiz show mash-up with Sean Lock and Stephen Mangan, who take on guest captain Richard Ayoade and Katherine Ryan. Bill Bailey is in with Susie Dent and Rachel Riley in charge of the letters and numbers.

8 Out of 10 Cats Does Countdown Season 12 Episodes...

• s12e01 - Stephen Mangan, Noel Fielding, Fay Ripley, Brett Domino Trio
• s12e02 - Russell Howard, Roisin Conaty, Nick Helm
• s12e03 - David O'Doherty, Johnny Vegas, Jamie Laing, Holly Walsh
• s12e04 - Joe Wilkinson, Jayde Adams, David Baddiel
• s12e05 - David Mitchell, Roisin Conaty, Tom Allen
• s12e06 - Jonathan Ross, Michelle Wolf, Johnny Vegas, Pappy's
• s12e07 - James Acaster, Lee Mack, Sarah Millican, John Cooper Clarke
• s12e08 - Joe Wilkinson, Chris Addison, Katherine Ryan, David O'Doherty
• s12e09 - Election Special: Alan Carr, Romesh Ranganathan, Sarah Millican, John Kearns
• s12e10 - Joe Lycett, Michelle Wolf, Adam Riches
• s12e11 - Jonathan Ross, Lee Mack, Victoria Coren, Jessie Cave
• s12e12 - Richard Ayoade, Stephen Mangan, Katherine Ryan, Bill Bailey

8 Out of 10 Cats Does Countdown Show Summary

In 2012, two of Channel 4's most popular quizzes - the topical hit 8 Out Of 10 Cats and the cerebral words-and-numbers game Countdown - came to metaphorical blows as the anarchic comedians of the former took on the brainbox format of the latter.

Jimmy Carr was the host, with Sean Lock and Jon Richardson as the contestants. Jimmy was helped by Countdown regulars Susie Dent and Rachel Riley, and hindered by Joe Wilkinson.

The gang returned to play Countdown a second time later in 2012.

In January 2013, as part of the next Channel 4 Mash Up, Jimmy Carr, Jon Richardson and Sean Lock hijacked an episode of Deal or No Deal. A number of comedians joined in, plus Rachel Riley and Susie Dent again. Joe Wilkinson acted as the Banker's assistant.

Since 2013, the show has run regularly with multiple-episode series.