By pushing science to its furthest, most marvellous extremes, The X-Files has captivated us with stories more strange and surreal than we'd ever dreamed possible. But are they as far-fetched as they seem? With the help of leading experts, scientist Jeanne Cavelos explores the scientific theories - and supporting research - that shed light on some of the series' most bizarre and compelling episodes. Could a man cause fungi to destroy everything he touched? What sort of nutrition could be derived from a diet of human livers? Would a man made entirely of cancer cells have the ability to grow back his decapitated head? Could concentrated human pheromones really make Scully do "the wild thing" with a stranger? Delve into the truth behind The X-Files - and the wonders of science will never look the same again...