The Battle of the Duds. Fan favourites Charles (expert topic: Horses), Lucy (Wars of the Roses), Leon (Vintage Australian Washing Machines) and dreamy dentist Theja (Sachin Tendulkar) get another crack at the Big Brass Mug.

What do the Wright brothers, The Book of Mormon, Aerosmith and the Volkswagen Beetle have in common? They're all topics on tonight's #HardQuiz, where four self-proclaimed experts match wits with the hilarious Tom Gleeson.