Hard Quiz — Episode 25: Musical Come From Away, Katy Perry, the Human Immune System & Descartes

You are watching the episode Musical Come From Away, Katy Perry, the Human Immune System & Descartes Tom Gleeson oversees another Hard Quiz battle for the Big Brass Mug. He welcomes alleged experts on the musical Come From Away, pop star Katy Perry, the human immune system and philosopher Rene Descartes!