8 Out of 10 Cats Does Countdown Series 12 Episode 5 Joe Wilkinson, David Mitchell, Roisin Conaty, Tom Allen ( Air Date 2017-02-10 ) Genre Comedy, Reality, Talk category. Overview "Jimmy Carr hosts the words and numbers quiz with Jon Richardson and David Mitchell who take on guest captain Joe Wilkinson and Roisin Conaty. Tom Allen is in Dictionary Corner.".