This debate ( audio | video ) took place in 2007 between Apologist(?) Allister McGrath and the Hitch concerning the topic: "Religion in the Modern World".
This debate was just meh. Hitch is the most fun when he is debating someone more caustic. McGrath just seems too liberal. This is a shame because the debate topic was more Hitch's style in that it wasn't about proving or disproving god, McGrath, IIRC, accepts evolution and is more of a lecturer, not a debater. But alas, this one just has a few interesting moments but nothing fun.
It is also a pretty short/poorly formatted debate. There isn't even a Q&A.
Technical: Good AQ and watchable VQ