David Hewlett is acting wonderfully in this episode.. I think it shows the real friendship among the characters and how far they're willing to go for each other.
I wonder what's going to happen now that Keller knows about McKay's feeling for her... Is it going to be the kind of relationship that Sheppard learned about in the future??
What I don't understand is why the Ancients would not have install a device emitting the same type of radiation than the shrine on Atlantis. If they were aware of the disease and built the shrine why not cure their own people in the city???
Well I think it's the best episode of the season so far..