How do you deal with memories you don’t want? Casey is still haunted by the time she hit and killed a pedestrian whilst driving her car. It wasn’t her fault. She remembers vivid details like the woman’s knee high stockings. Paul still regularly thinks about how his carriage crumbled in the Granville train disaster, although it happened almost 40 years ago. Esther still struggles to look at a plate of rare meat after years of service as a police officer and forensic investigator. This week, Insight looks at how our brains process painful memories, and whether talking about them makes them better or worse. Are some memories so bad they’re better to forget?