Angela Rippon and Dr Chris Van Tulleken team up with scientists to turn back the clock on a group of volunteers, and demonstrate what can be done to reverse the ageing process. In the second episode, 57-year-old Kamini Sohdi discovers how building muscle will make her body stronger and protect her against illness, while 50-year-old Alison Richards finds out a surprising way to tackle memory loss and make her brain younger. Plus, 51 year-old stress eater Tim Belton has one of the worst results the team of scientists have ever seen, putting his life at serious risk.