Justin Taylor, a blogger worth reading, has shared a lengthy interview with John Lennox on the existence of God and the Christian faith.  Lennox is Professor in Mathematics at University of Oxford and Fellow in Mathematics and Philosophy of Science at Green College, University of Oxford.  While the original interview was provided by the Center for Public Christianity, Taylor has the individual segments of the interview listed on his blog at:

http://thegospelcoalition.org/blogs/justintaylor/2008/11/26/
video-interviews-with-john-lennox/