The most important part of this episode - Carson is back. It was so incredible to hear his voice again, those phrases he always uses.. like he has not been away, but yes he has.. and oh, I have missed - that depth what this char has, the story.. oh.. and it was so beautifully done - the way they brought him back.. it was logical and somehow even sad, and very emotionally moving. Specially his dialogs with McKay - and we had some very great moments on this episode.
Even thought this episode was all about Carson, it was a Teyla too - her struggle to get Kanaan back and her meeting with her people - very emotional and moving. Some of them are still alive, good to hear.
And the action, what we had.. and some great scenes.. visually.. specially loved the final confronting - Beckett versus Michael. It was stunning.