Sir Stephen Fry, actor, comedian and recent star of 'Celebrity Traitors', joins the renowned Canadian computer scientist and 'Godfather of AI' Yoshua Bengio. They discuss their shared concern about the development of advanced AI systems. Does the world need a red telephone, as introduced in the nuclear era? What are the dangers of people forming emotional attachments with machines? And where do the solutions lie? This week presenter Christian Fraser is joined by regular host Dr Stephanie Hare.