Hannah Fry discovers why innovations in meat packing almost derailed the electric car revolution and how a breakthrough in camcorder batteries led to Elon Musk's electric empire, as well as demonstrating how not to drive a multimillion dollar prototype car of the future.

Did you know that a family feud created two of the world's biggest trainer brands? Hannah Fry visits Ebay's authentication centre, where they are waging war against fake high-value trainers. She discovers how American breakfast waffles transformed our trainer soles, and how an 18th century tea set led to the use of celebrity endorsement.