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

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

• s10e01 - Vic Reeves, Aisling Bea, David O'Doherty
• s10e02 - Bob Mortimer, Holly Walsh, Isy Suttie, Claudia Winkleman
• s10e03 - Johnny Vegas, Alex Brooker, Sara Pascoe, Claudia Winkleman, Rob Beckett
• s10e04 - Kevin Bridges, Rebecca Front, Joe Lycett
• s10e05 - Katherine Ryan, David Mitchell, Nick Helm

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.