View the rest of the debate here: http://www.youtube.com/user/ItsCWG

Part 1 - Sam Harris debated William Lane Craig at Notre Dame University on 7 April 2011 on the topic Does Good come from God?
Are the foundations for moral values natural or supernatural? - This was the way the debate was introduced by the moderator.

Introduction overview of the speakers (taken from the website):

Sam Harris, one of the "Four Horsemen of Atheism," a neuroscientist, philosopher, and bestselling author, will seek to show that the separation between scientific facts and human values is an illusion. Harris will prove that science, not religion, should provide the basis for morality.

William Lane Craig is an American Evangelical Christian apologist, theologian, and analytic philosopher known for his work in the philosophy of religion, historical Jesus studies, and the philosophy of time. One of the foremost apologists in the field, Craig has faced some of the best and has been known to hold nothing back in his sharpshooting style of debate.