People often associate Obsessive Compulsive Disorder with someone who is overly fussy about cleanliness and tidiness. However it can affect people in a whole load of elaborate ways you may not have even considered yet. Developmental psychologist Uta Frith, a professor of neuroscience at University College London, sets out to dispel misconceptions about OCD. She introduces Sophie, who must constantly check she hasn't killed people wherever she goes, and Richard, who is terrified of coming into contact with bins. Also featured is the story of Nanda, who is undergoing pioneering brain surgery to stop her worrying about 'components' on her body. Having explored the impact OCD can have on people's lives, Uta investigates therapy available to those struggling with the condition, and outlines whether neuroscience can offer anything by way of a cure.