Jimmy Carrandnbsp;hosts a new edition of the irreverent take on the classic letters and numbers quiz.andnbsp;Jon Richardsonandnbsp;andandnbsp;David Mitchellandnbsp;take on guest captainandnbsp;Joe Wilkinsonandnbsp;andandnbsp;Roisin Conaty.andnbsp;Tom Allenandnbsp;joinsandnbsp;Susie Dentandnbsp;in Dictionary Corner, whileandnbsp;Rachel Rileyandnbsp;looks after the numbers and letters.
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
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.