 Graham meets a robotic fish in the London Aquarium and looks at a system of lasers and telescopes that can detect small pieces of space junk. Kim plays a game of Top Golf in Washington, DC. Anna drives a road-legal car that quickly changes to a racing simulator, and visits a shop where people can sample wine without it going to waste. Caroline looks at a first aid kit with its own talking medic. Adam and Jamie test the myth that the daddy long-legs is the world s most toxic spider. Hayden meets a self-playing violin