It's time to play (HARD!) as Tom Gleeson grills pterosaur expert Ilona, Einstein expert Bill, Red Bull Air Race expert Daniel and 'Dynasty' expert Alyssa. Which Quizzer deserves the glory - and Tom's Big Brass Mug?

Tom Gleeson pits four experts against each other. Competing for tonight's Big Brass Mug: Jay, a Babe Ruth expert; Brett, a Billy Joel expert; Rowan, an expert on the Cold War & Megan, an expert on TV comedy The Mighty Boosh.