This is a wonderful performance piece, for Cold-War, Tom Clancy/John Le Carré lovers alike. Spying was a dangerous, heart-breaking and lonely game, and the principle characters on both sides gave up much in the way of personal life - this slowly tumbles out as the story unfolds over 4 decades.
I credit the Director with NOT revealing too much the first time you view it - I found myself wondering at certain points if the Script contained gaps -- not so. An example is the involvement of the notorious Kim Philby, a clever KGB double-agent. Everyone who has read 'Man Called Intrepid' knows who Philby is - if he breezed into this story as KIM PHILBY, we'd know what to expect. Cleverly, the character is not identified until the story is well-under way. By that time, you are as fooled as was his friend, the famous CIA counterespionage guru, James Angleton, played here with craft by Michael Keaton.
Other performers shine, and the action scenes for Hungary, and the Bay of Pigs are startling. Part 3 packed a real punch as, again, we get treated to what the counterintelligence fellas had to go through to nail suspected double-agents.
The second time through, I connected all the dots--so, the mini-series DVD has been well worth the investment. (Glad I missed it on TV with commercials).