These programmes tend to be of the line that these are viable documents and were discarded because they disagreed with the four now in the New Testament cannon.
Actually that's not far from the truth, some of them are so wild that they really don't have anything to say and some are known to have been created well after the cannon was agreed.
Wayne Grudems' "Systematic Theology" is available in podcasts
http://itunes.apple.com/us/podcast/w...gy/id322844869
There is a chapter on cannon (Chap 52).