Overview: It’s the last show in the series and we’re going out with a bang. Bunging the whole lot into a couple of microwaves – stand well back. We find out how to win at the dogs and the funfair arcade. What chemicals not to put in your spin dryer. Which is Britain’s best dunking biscuit. Do different foods do strange things to your wee. Does eating fish improve your brain power. We wave goodbye to a brainiac – where not to hide when the bomb goes up.