Tom Gleeson is an expert at drawing contestants out of their shells, and with topics as varied as the C-130 Hercules, Little Shop of Horrors, Simone Biles, and World of Warcraft, there's something for everyone.

Hard Quiz brings together four contestants with four expert topics and puts them all under Tom Gleeson's merciless microscope. Topics include: the First Persian Empire, the Wiggles, TV show Scrubs, and Guinness.