Angela Rippon and the team reveal more secrets about our food and the way it's sold. Could that bag of healthy-looking salad at the bottom of the fridge be harbouring a dirty little secret? And how much notice should we take of all those confusing dates on the labels of what we buy? Could a good old-fashioned sense of smell be a better way to determine what is safe to eat? Plus, why frozen food can sometimes be better for you than fresh, and the campaigners determined to cut down on supermarket waste and at the same time ensure nothing goes uneaten from the farmer's field.