The documentary has never been shown on American television. You can download it for free at http://www.archive.org/details/ThePowerOfNightmares
I am not going to tell you what you should think about it. I will only say that it is interesting and compelling.
I do not know enough to judge how accurate the material is, but I learned quite a bit just from Part 1 – Baby It’s Cold Outside. I know less than I should about the politics of the 1950s, 60s and 70s; the film actually filled in some of the gaps, e.g. the origins of neo-conservatism and some of the activities of Team B.
I would be interested to hear what anyone else thinks about it.