8 Out of 10 Cats Does Countdown: Season 17, Episode 4

17 - 4: David Mitchell, Sara Pascoe, Ellie White, Natasia Demetriou

Sean Lock and David Mitchell take on Jon Richardson and Sara Pascoe. Plus, Ellie White and Natasia Demetriou join Susie Dent in Dictionary Corner, while maths whizz Rachel Riley looks after the numbers.