What would happen if six celebrities in their seventies and eighties went back to 1975?! Could just one week of living in the past make Liz Smith, Lionel Blair, Dickie Bird, Kenneth Kendall, Sylvia Sims and Derek Jameson physically turn back the clock; could reliving their heyday allow them to think themselves younger? Or just serve to highlight how much time as past... BBC One sends six well-loved stars of yesteryear back to the badly decorated time of fondue and flares to conduct an extraordinary experiment which will change how people see ageing for ever. From the food to the clothes, the television shows to their day jobs, the group is immersed in the world of their heyday in order to discover the enormous power the mind has over the body, and to illustrate how people age. Presented by Mariella Frostrup and resident BBC One scientist Dr Michael Mosley, The Young Ones provides a refreshing, uplifting take on ageing, looking at how a person's environment can shape the way that they think, and how, in turn, the way people think shapes how they feel.