8 Out of 10 Cats Does Countdown as part of its 30th anniversary celebrations. Amongst the programmes that were chosen to be merged for the evening of specials, production teams on "Countdown" and "8 Out of 10 Cats" agreed to merge the two formats of their respective programmes together - the crossover between the two formats meant that "Countdown"s arrangement of games would be interspersed with "8 Out of 10 Cats"-style banter. As part of the merger, both Rachel Riley and Susie Dent assumed their roles from the programme, while Jimmy Carr took on the mantle of host, with both Sean Lock and Jon Richardson competing as
8 Out of 10 Cats Nicola Adams, Rob Beckett, Gemma Collins, Mia Cross, Corinne Davies, Susie Dent, Matt Forde, John Fothergill, Stephen Frost, Nick Helm, Elis James, Dave Johns, Tony Law, Alice Levine, Mark Olver, Rachel Riley, John Robins, Katherine Ryan, Nong Skett, Andy Smart and Holly Walsh. A series of podcasts have also been released on iTunes, with material directly from the show for several episodes. Each podcast is typically the "What Are You Talking About" round from that episode. The coloured backgrounds and the numbers in the winner column denote the result of each of the series: "8 Out of 10 Cats: Claws