Jimmy Carr hosts this edition along with regular 8 Out of 10 Cats team captains Sean Lock and Jon Richardson who are joined by Dara O Briain and Sharon Horgan.

Countdown's Susie Dent is in Dictionary Corner with help from Adam Buxton, while Rachel Riley provides the letters and numbers with 'help' from comedian Joe Wilkinson.

8 Out of 10 Cats Does Countdown Season 4 Episodes...

• s04e01 - Rhod Gilbert, Kevin Bridges, Josie Long
• s04e02 - Miles Jupp, Aisling Bea, Nick Helm
• s04e03 - Kathy Burke, Josh Widdicombe, Dara Ó Briain
• s04e04 - Dara Ó Briain, Sharon Horgan, Adam Buxton
• s04e05 - Jack Dee, James Corden, Joe Lycett
• s04e06 - James Corden, Kevin Bridges, Peter Serafinowicz

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.