The Americans

The series finale reminded me of some of the John Le Carre books where spies find out that there is not really a good and bad side and the side they are working for is really just as corrupt and despicable as the enemy they are fighting against. Its all just a waste of their lives, some like Smiley see that it's their job and they keep doing it because it's all they have known.

Spies, like other soldiers are just used up by those in power. Usually when they find out that is the game they have been playing, the damage is already done.