I must admit that I was slightly disappointed that ONCE AGAIN there was no back-story for Sheppard when I seem to recall that it was promised. Now we have to wait for Phantoms.
Aside from that, I loved this episode so much that my brain cannot fully comprehend its awesomeness.
The old!Shappard make-up kind of made Joe Flanigan look like Sam Waterston from Law & Order, but at least it was believable. Chris Heyerdahl was awesome as the captive wraith. But mostly Joe Flanigan brought out the awesome.
He did exhausted and pained very well, and kudos to the writers for keeping Sheppard's little personality ticks consistant. I also loved that old!Sheppard was still able to PWN multiple Genii. I swear that he's more than just a pilot. Like a PJ or something. Not all of that can be from training with Teyla and Ronon.
I wonder if we'll see Heyerdahl's wraith again? It would be interesting to see. Perhaps in the fourth season?