Trainer

시즌 1, 에피소드 6: Trainers, or sneakers, are a multi-billion-dollar business with a devoted, obsessive following. In this technology documentary, Hannah Fry visits eBay’s authentication center, where they are waging war against fake high-value tennis shoes. She discovers how American breakfast waffles transformed our sneaker soles and how an 18th-century tea set led to the use of the celebrity endorsement.