Journalist and broadcaster Jon Ronson looks at the human condition with the help of interviewees and reporters from the world of writing and performance. Jon investigates why often it is so difficult to leave a particular incident in the past. He he looks back to the time when he was thrown into a lake by his school friends, and confronts his bullies at his school reunion. Father Ted writer Graham Linehan remembers his own bully, and comedians Dan Tetsell and Robert Popper discover that they have parallel stories: one has a Nazi grandfather, the other a Jewish evacuee grandmother. A Unique production for BBC Radio 4.