Jerry Hall enlists the help of some of the comedy world's biggest names to highlight the importance of laughter. She aims to examine the psychology and physiology of laughter to determine how and why we laugh, what makes us laugh and why it is one of our basic human needs.

By studying comedy styles such as sarcasm, satire and slapstick, through to popular and high-brow comedy, Jerry examines the neurological effect laughter has on our nervous system and moods and explains how laughter really can heal the body and mind.