Haven't had the time to go through everyone else's posts, so hopefully I won't be too redundant.
In the garage scene, each of the 3 mains showed their patriotism, Philip with his confession and reveal about Oleg's mission, Elizabeth by NOT resorting to violence, taking in the conversation around her and supporting Philip, Stan by actually listening and realizing that the only thing each of them were doing was working for their country, whichever one it was.
Stan: He finally grew a brain. When he told Philip that Oleg had been arrested, I could see in his comprehension of Philip's reaction that he knew it was the truth. We already had the corroborating scene of Stan with Oleg in the cell when Oleg tells Stan how this is all about Gorbachev. I think that was the moment Stan knew he would let them go.
Oleg: I think he stands a chance. In my fantasy continuation, P&E are taken to friendlys by Arkady, Gorbachev gets the story on how P&E& Oleg all worked to save G's skin, and some arrangement is made to release Oleg, probably banished for life from the US, which I don't think he would look upon as any great hardship, all things considered.
Elizabeth: surprised me with her abstinence from violence, especially when Philip flipped into confession mode. There seemed to be a moment at the beginning where she may have been considering the 'get down on your knees' command as a prelude to an attack as we have seen her do before. But when Philip demurred, there was just a flicker of recognition in her eyes (fine bit of acting craft, that) and things went uphill for the Jennings clan. At first I thought that moment of hesitation before they crossed the border was the prelude to another disagreement, but it morphed into 'coming home', which was good to see.
Philip: definitely the absolute star of the episode, if not the series. Particularly about Henry. He knew how much child-Henry had idolized Stan, considered him a hero, wanted to be like him - and that has to be hard for any loving dad to take. But they did good in leaving him behind and in the good-bye without spilling the beans phone call. I LOVED it when he asked Arkady to pull over - all just to take a look at what they had left so long ago - what was home. I had been thinking about that. I have not lived in the place where I was born for over 50 years, BUT it is still the first thing that comes to mind when I say or think 'home'....so I get something of how they feel, but for them it must have been SO much more intense as they were returning to a place they had only known as full of deprivation and hardship (which some say is the best place to find good soldiers). I had always had the sense that his occasional suggestion of turning themselves in and staying in the US wasn't really his idea of the best was to get out of the spy game - just the most expedient. I could see how much it cost him to, in essence, acknowledge that Stan was the best choice to look after Henry. I also think one of the things Arkady would do for Philip is to arrange for him to at least meet the son who went thru so much trouble to try and see him.
Paige: what and Idiot! Even when momma and papa spy are telling her they have to leave fast and have to leave Henry behind, she doesn't have enough brain cells or training to figure it out but has to throw yet another tantrum and demand they all stop and take a minute!! Most telling was her final scene in the safe house...instead of going to her apartment, to the FBI, or to Henry, or pastor Tim...little miss wanna have the ultra cool & romantic life of a spy just couldn't take that final step and go to Russia cuz it all fell apart. I see her spending a LOT of time being questioned and attempting to rationalize her entrance into Spy School 101.
Henry: He's gonna be fine. They will do a LOT of in-depth investigation (but will have to admit that Stan DID suggest P&E were spies long before TPTB in the FBI would even consider such a ridiculous premise), but with uber-patriot Stan standing up for him, and the totally clear background and US birth certificate, he will eventually be granted his parents net worth of assets left behind, probably become Stan's ward for a while and may even, sometime in the distant future, make a trip to the USSR to see his parents - but he'll have a lot to forgive before he can even consider that.
Renee: Yup, never been a doubt in my mind that she is either deep cover KGB, or deep cover white-supremacist (but I think they would have gone for the quick revenge, so my money is on KGB) I can just picture Stan during that heart - to - heart at the hockey rink telling Henry that 'oh, by the way, don't say too much in front of Renee'.
All in all, I loved this finale. It really did live up to it's title
Yes, I did miss one more Martha moment...but who knows....maybe we'll be graced with a spinoff?!?!?!?