There is something you can do which is enjoyable, will improve your mood, cut your risk of depression, help you fight chronic disease, keep you slim and even improve your memory. Yes, getting a good night's sleep can give us all these things and more; so why is it that so many of us struggle to get the necessary 7-8 hours a night? In 'Fast Asleep', Dr Michael Mosley brings together the latest science to explain exactly what happens to us when we sleep and why it is so important that we get enough of it. Prone to insomnia, he has taken part in numerous sleep experiments and tested every sleep remedy going. He explains why so many of us struggle with sleep, what works and what doesn't and shares his own myth-busting programme to help you achieve a good night's rest.