This new three-part documentary looks at how 12 Brits have trouble sleeping at night. Remarkably, none of the people featured are members of the House of Commons.
The British are the worst sleepers in Europe, with a third of Britons having some sort of sleeping disorder. This episode follows four particular patients who have a range of different sleeping problems.
Among the issues covered in this programme include restless leg syndrome, narcolepsy and extreme night terrors.
The Secrets of Sleep is on More4 at 22.00.