Overview: Sara meets a person who is using the Internet to make a number of trades from a red paper clip to a house in Bonnie Doon, Victoria, made famous by "The Castle". Adam and Jamie test the myth that hair care products can cause an explosion in a fighter plane. Anna looks at a forensic science breakthrough that allows a person's cause of death to be determined in minutes without undoing a body bag. Hayden drives the Lamborghini Murcielago roadster, one of the world's most powerful production cars.