In the first of two special holiday episodes, Claudia Hammond and an expert panel of psychologists look back, nostalgically.

At this festive time of year, you might be thinking wistfully about Christmas past – perhaps you’ll be rewatching old films, arguing over a game of Monopoly, or listening to Christmas music that drives you mad. Maybe you are looking back with rose-tinted spectacles on the Christmases gone by that seem somehow more magical than they are now. Or perhaps it’s hard to look back without feeling a tinge of sadness. Whether you fall on the more bitter or more sweet side of bittersweet, this is the bittersweet feeling of nostalgia. And it is particularly rife at this time of year.

But nostalgia wasn't always just a feeling. Historian Agnes Arnold Forster tells Claudia and the panel that once it was viewed as a disease so deadly that it appeared on thousands of death certificates. And now this poignant emotion stirs political action, bonds us to others, and guides our very understanding of ourselves.

Peter Olusoga, Senior Lecturer in Psychology at Sheffield Hallam University, Daryl O’Connor, Professor of Psychology at the University of Leeds, and Catherine Loveday, Professor of Cognitive Neuroscience at the University of Westminster, join Claudia in the studio to discuss how leaning into nostalgia can help us feel better, reduce pain and even inject a bit of romance into life.

Presenter: Claudia Hammond Producer: Lorna Stewart Content Editor: Holly Squire Studio Manager: Emma Harth