Battlestar Galactica: "The Oath" and "Blood on the Scales"
Oh Jesus Christ, I'd forgotten how much I loved these two episodes. This two parter is one of the best segments in one of the greatest TV shows ever made. The point where the cord finally snapped, where everything that had been building up for seasons finally came tumbling down and into the open, crushing and destroying a few along the way. Goddamn, it's great to watch this again.
Game of Thrones: "Winter is Coming"
The season one premiere episode. Finally rewatched it. The episode that I decided to watch, more or less on a whim, a year ago. The one that got me into this absolutely fantastic series. Everything from the White Walkers to Bran's tumble was just perfectly set up to build both an interest in the show, but also a fantastic sense of dread and foreboding. Winter is Coming, indeed. And I can already tell that it will be long, dark, and terrible.