This entire programme is available for download (mpeg2) at Internet Archive (www.archive.org) with the good graces of Adam Curtis.
It is possible that right now only part I is up--but parts II and III will be soon.
All three parts are up.
http://www.archive.org/details/ThePowerOfNightmares
[deleted]
ALSO available via Google Video (all three parts are up). The first part ("Baby It's Cold Outside") is
http://video.google.com/videoplay?docid=461187809452836609&q=the+power+of+nightmares
Do a search for the entire series.
It's not free...it's paid for by my TV Licence, which is a stupid UK tax on TV ownership. You all go ahead and enjoy it, though!
"Man's mind is so formed that it is far more susceptible to falsehood than to truth"