It began like any other day; with an impending threat over the City and a larger-than-life enemy to fight. It didn't matter that only a couple of hours ago she was dying, her men needed her to fight and so she did the only way that she knew how. We say good-bye to Elizabeth in her own terms; after she's effectively outsmarted Oberon to get her people out, helped them retrieve the ZMP they needed to survive and imprinted a code that would allow the replicators to fight the wraiths from now on, just like the ancient envisioned them to. However, the fact that she remains captive by the collective and no one can get rid of the nanites in her system makes her team painfully aware that they might never see her again.
Who they do see and hear again is Colonel Samantha Carter who manages to rescue them just in time much to Rodney's relief; with her help they manage to finally reach the City, land on a new planet and dial earth for the first time from their new location. We get our first glimpse at how the McKay/Carter dynamic is going to be from now on and even a slightest hint on how it'll affect Sheppard in the long run but the best character interaction belongs to the orphans Dr. Weir harbor once upon a time, for it's Ronon and Teyla the ones who sum it up at the end: whoever replaces their leader has one though shoes to fill.