This is not a formal or informal debate. This is a formal philosophy conference exchange in which William Lane Craig, Daniel Dennett, and Alistair McGrath were attendees. In this audio, William Lane Craig delivers the primary lecture (45 min) defending Theistic arguments against criticisms by Daniel Dennett. This is followed by responses by Daniel Dennett (15 min) and Alistair McGrath (5 min).
[HT: WLC Comprehensive Debate List]
Full MP3 Audio here.