Why have been the last 3 parts banned now?
I just found out that parts 7, 8 and 9 have been banned (last year I was still able to request them via public library, because it was totally over-priced in amazon.com and amazon.ca).
This only proves to me that Nigel Turner was on the right trail and one of the people mentioned in part 7, 8 or 9 indeed killed JFK, but some "higher up powerful/influential people" obviously intimidated the director and forced him to withdraw parts 7, 8, 9 and 10 (and yes, there also was a 10th part which the History Channel announced in November 2003, but it was never aired).