A plush country house is fixed with surveillance cameras while a group of unwitting test subjects are first exposed to youthful memories to test if it can improve their health. Dr Mosley takes them on this nostalgia trip with the help of neuroscientist Dr Jack Lewis and psychologist Anna Machin to determine how reliable memories really are.
In part 2, Prof. Arthur Shapiro takes us through visual illusions that show how our brain processes retinal impressions from light and dark. Watch as things "move" while they are standing still. It will be hard to believe your eyes after watching this program!