It´s been estimated that there are 111 different types of lie. Or did someone just make that up? Some good, some bad, and a few just plain evil. Individually, we each tell as many as 15 porkies a week (is that all?),and are on the receiving end of even more. And yet despite the fact lying is everywhere, few other human traits are so little understood. In this episode, Exposed attempts to unravel some of the mysteries surrounding this most powerful and seemingly instinctive human trait.

We´ve all been there. It can cut like a knife, tear our lives apart, even make us kill? In this episode, *Exposed* investigates the devastating effect that social and romantic rejection can have on our brains, our bodies and our behaviour. Using the latest neuro-imaging technology, we explore the links between social rejection and physical pain.

Parents, advertising, friends and politicians... Persuaders and Persuasion are all around us. But how do the great persuaders tempt us to part with our hard earned cash, behave in a certain way, even feel the way we do? Why do we allow ourselves to be manipulated, and how can we make people do what we want them to do? In this episode, we find out how some of the most pervasive persuaders, including salesmen, advertisers, shop owners and composers, manage to get what they want.

What is it that can make a simple journey to work so stressful? Do city dwellers behave differently to their rural counterparts? Has the urbanite struggle to cope with the pressures of city life made them behave like animals? Is this why thousands are now abandoning cities in search of stress-free lives in the country? To answer these questions, Dr Marsden reveals the strange rules of Urban Etiquette. Through experiments on unwitting subjects he tests whether sensory overload and urban anonymity really make us irresponsible, confused and violent.