Is it ever morally acceptable to kill one person to save many? Most people agree that in some extreme circumstances this, though psychologically difficult, can be the right action to take. In this episode of the Philosophy Bites podcast, Nigel Warburton interviews David Edmonds (co-creator of the Philosophy Bites podcast) about the life and death thought experiments known as Trolley Problems. David Edmonds book about  Trolley Problems Would You Kill the Fat Man? will be published in Autumn 2013 by Princeton University Press.