Hard Quiz — Episode 14: Diamonds, Social Psychology, Novak Djokovic & the Australian Dung Beetle Project

You are watching the episode Diamonds, Social Psychology, Novak Djokovic & the Australian Dung Beetle Project Battle of the Duds! Tom Gleeson faces four people foolish enough to have a second try at the Big Brass Mug with their expert subjects of diamonds, social psychology, Novak Djokovic, and the Australian Dung Beetle Project.