One thing I've marvelled at was when I came accross this subheading under the article "Biblical Literature" from the Encyclopedia Britannica:
THE NEW TESTAMENT CANON
The process of canonization
Determination of the canon in the 4th centuryAthanasius , a 4th-century bishop of Alexandria and a significant theologian, delimited the canon and settled the strife between East and West. On a principle of inclusiveness, both Revelation and Hebrews (as part of the Pauline corpus) were accepted. The 27 books of the New Testament?and they only?were declared canonical. In the Greek churches there was still controversy about Revelation, but in the Latin Church, under the influence of Jerome, Athanasius' decision was accepted.
So from this article it would appear that the guy who had the final say on the matter was none other than the guy the WTS would consider as one of the biggest apostates in history (the chief defender of Christian orthodoxy in the 4th-century battle against Arianism). How do they deal with this point?
Anyway, although I don't remember the specifics of the show (I was still new to all this so it was in one ear-out the other) I thought that this PBS series was pretty interesting: http://www.pbs.org/wgbh/pages/frontline/shows/religion/
It had a portion dedicated to the determination of the canon.