I knew it was going to happen going into the episode armed with practically no spoilers. I knew that the PTB would give John Sheppard a few more notches on his bedpost.
I mean, what was up with that nurse practically desperate for him? It was totally unnecessary and done only to make John seem more "hot". So either we have a desperate nurse imagining they have a bond or they did go out/have a date/have sex/do something once and now John is refusing to acknowledge it (which would make him a jerk) or both.
And whatever the answer is, it was totally unnecessary. Then we found out John was "involved" with the medic whom he got several people killed trying to save. Yay, John! Let's give him some dead conquests out of the blue!
And in doing so, let's make him even more irresponsible than before! "Hey, my girlfriend has been captured! I'll go against direct orders, risk the lives of several of my fellow soldiers and try to save her!".
Before, we could imagine John being a tragic hero, trying to not leave any man behind. Now, it sounds more like him just letting his feelings cloud his judgment, as usual, and getting a lot of people killed because of it...
But we can forgive him for that. What we can't forgive him for is that (if this was indeed what happened for our!John as well) the fact that he didn't learn a damn thing from it. He's still letting his feelings get the best out of him, leading him to endanger the lives of countless people or all of Atlantis for the sake of a few quite often.
So he basically learned nothing from that incident. And how the hell did Elizabeth manage to convince the U.S. military and the IOA to keep him on as head of Atlantis' military contingent?!
So either the person he was trying to save wasn't a medic who was his girlfriend (in our!Universe) or this episode just introduced a ton of new plot holes.