Without wishing to derail your thread I recently saw a very interesting (UK ITN, unedited) interview with Oliver Stone from 1991, where he discusses why he made JFK and part way through the interview he makes reference as to why he has not made a documentary (around 8-10 minutes) - the facts have been kept secret by the Government.
I hope you don't mind me commenting as I appreciate you have asked a question to another member, but as a relative newbie of 7 years I found the documentaries fascinating, I watched them 3 or 4 times and each time I came away feeling I had learnt a bit more. In parts it reinforced what I had understood from my own research, in a number of places it took me a step further to having a deeper understanding of matters and their implications and it enlighten me in areas which I had previously been less interested in (the autopsy for instance).