I watched this for the first time last summer. It was an experience, that's for sure. I don't know if I liked it as much as I expected to, but the show definitely stays with you and I keep thinking about it every so often.
As far as Lost goes, the creators have mentioned the show as a key influence. Back when they were putting the show together, they were expecting it to be canceled after half a season and felt if the best they could do was put out a cool mini-series in the vein of The Prisoner, it'd be worth it.
And I have no clue what goes on in the last two episodes. It will definitely be cool to revisit. The Prisoner is a show like Lost in that it raises a lot of questions. The difference is none of them are answered. It ends things in a fairly vague and out there manner that still feels like a fair conclusion.
