8 Out of 10 Cats Does Countdown — Episode 3: Richard Ayoade, Katherine Ryan, David O'Doherty

You are watching the episode Richard Ayoade, Katherine Ryan, David O'Doherty Jimmy Carr hosts as Sean Lock and Richard Ayoade take on Jon Richardson and Katherine Ryan. David O'Doherty is in Dictionary Corner with Susie Dent, and Rachel Riley looks after the numbers and letters.