From Victorian seances to schemes which upload our minds into cyberspace, there are myriad ways in which human beings have sought to conquer mortality. The philosopher, John Gray, discusses his book "The Immortalisation Commission: Science and the Strange Quest to Cheat Death" with Laurie Taylor. The cultural historian Marina Warner joins the debate. Also, listeners' response to Thinking Allowed's recent discussion on the sociology of 'evil'. Professor Barry Smith, the director of the Institute of Philosophy, explores contrasting analyses of 'evil' within modern thought.Producer: Jayne Egerton.