I love that the two big set piece rescue moves (Ronon and Keller and the oxygen, and John climbing up the tower) both did very little to help the situation, and in John's case made it worse. Somehow, that's so much better than cheesy save the day style stuff (plus, it got us Zelenka saving the day, which was very cool).

Also - how is it that an episode in which they spend about 2.5 seconds together can be so incredibly slashy, at least from John's point of view? Seriously, writers, you could have the first openly gay couple on a sci-fi show (I think) - make some tv history!