In 1956, a group of young scientists predicted that the whole range of human intelligence would be programmable within their own lifetimes. Nearly half a century later their field has expanded and developed - with mixed results. Based on interviews with the major players in the field, AI chronicles their dramatic successes and breakthroughs and discusses the next necessary breakthrough - the simulation of common sense - whilst at the same time raising profound philosophical questions about mind and soul which arise from the subject.