Chuffed about this to be honest.. these are always great - particularly Joe Wilkinson's appearances.
The 3 - 4 specials they've done so far have always been entertaining.
Oh, and here's all the specials on 4OD for those who may have missed them.
Channel 4 has commissioned a full series of 8 Out of 10 Cats Does Countdown.
Jimmy Carr will host the mash-up comedy quiz, while regular team captains Sean Lock and Jon Richardson will take on the words and numbers game.
Sarah Millican, Jason Manford, Jack Dee and Rhod Gilbert will be among the celebrity guests for the summer programme.
Countdown's dictionary corner specialist Susie Dent will appear with a different guest each episode.
Mathematician Rachel Riley will also take part in her usual Countdown role, along with her assistant Joe Wilkinson.
The 8 Out of 10 Cats 'mash-up' specials previously aired on Channel 4 in January 2012.
Entertainment Commissioning Editor Madeleine Knight said: "Originally commissioned as part of the Channel 4 Mash Up night, 8 Out of 10 Cats Does Countdown has proved it deserves a run of its own.
"This combination of two of Channel 4's favourite shows brings together the best of both. It's a treat."
Zeppotron Managing Director Ruth Phillips added: "It's such a treat for us to be making more of 8 Out of 10 Cats Does Countdown, not least because Countdown is such a robust format to have fun with.
"The combination of both shows means viewers get to play along so it really is something for both quiz and comedy fans alike."
The show will be broadcast later this summer on Channel 4, and will be produced by Zeppotron & ITV Studios.
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