As the program indicated, McCarthy was right in general, i.e., the government was full of Soviet Spies, but he was apprently off the mark in the details; i.e., only two or three of the folks that McCarthy denounced as spies were actually spies (so far as they could tell.)
All in all, it was a very informatiom program, and I took great personal satisfaction at the revelation that Hiss was without a doubt a Soviet spy, having once sat less than six feet from the scumbag while he wasted an hour of our class time protesting his innocence. I had no doubt he was lying at the time, and it is nice to know my impression of him has been vindicated.
I admire your screen name, BTW. It ranks up there with "OBAFGKMN".
But I think that much of the truth of the cold war may never see the light of day. (Kennedy's death...)