Synopsis:

One in two marriages fail, yet most people still dream of finding a partner for life. Top psychologist Oliver James, about to get married himself, journeys deep into the heart of a paradox which affects us all in an attempt to discover whether he's making the right choice in forsaking the chance to enjoy a life of multiple partners. Along the way he meets Jonathan Ross who describes how he's kept his marriage together, Margaret Cook who explains why men are more likely to be unfaithful than women and Ulrika Jonsson, who talks about the influence her parents divorce has had on her relationships. Oliver also quizzes members of the public on their attitudes to infidelity. Is a long and happy marriage still a realistic option or simply the stuff of dreams?