Great show, but the season finale... (spoilers)
...was undercut somewhat by the sheer stupidity of some of the characters.
The main one was undoubtedly Grigory's response to the car being shot at by slowly walking in front of where the bullets were landing, and Julie wasn't much better. I mean, after being explicitly warned to shoot first if anyone came for her she tucks the gun away in a drawer (semi-understandable with the kid and all, but still pretty dumb) and decides to have a chinwag after Grigory comes and says hello.
I'm not sure how much handgun bullets would be affected by a motel door, but unloading at least a couple of bullets into it while he was standing outside would have been a way more appropriate response than waiting for the scary evil man to grow bored and start his shotgun phase.
Then, of course, there was Mr. 'We don't take prisoners, but why don't we have a chat now that you've killed all my men and have your hands tucked tightly down your back like a significantly less subtle John McClane at the end of Die Hard?' in the woods, and... yeah.
I know some people have been complaining about fairly innocuous goofs that slipped clean past me, and I honestly don't care about most of those moments from episodes past, but reactions like this from supposedly intelligent or ruthless characters in the finale for the matter of convenience took it all just a little too far.
Great series as a whole, though.