In the final episode of the series, the doctors reveal the secrets to how we can all stick to those health resolutions we made at New Year, but are already struggling to keep.

Surgeon Gabriel Weston experiments with a herbal supplement said to help us drink less alcohol, Dr Chris van Tulleken reveals some unusual ways to get a better night's sleep, and Michael Mosley uncovers the secret of staying motivated.

Meanwhile, Dr Saleyha Ahsan tests some revolutionary new science that could help us all easily lose weight and be healthier. Show less