I just watched the season premiere today on Hulu (the wife lost interest during the strike).

I have to say that it was pretty emotionally charged, more about feelings than actual events. I'm not sure how they're going to explain all of the Terminators having hands in pretty much every event that lead up to the creation of Skynet. Talk about messing with the timeline. I supposed an advanced AI has gone through all the ways this could go wrong and still went through with it.

I made this timeline comparison last season to explain to my wife and friends how things are flowing in the different movie/TV show timelines.

EDIT: Updated to Season 2, Episode 2 ("Automatic for the People")