Here's a good blog post by the series creator and executive producer Josh Fieldman:
http://sarahconnor.wetpaint.com/page/Producer%27s+Blog

It explains some of the concerns we were having earlier, especially the head time-travel thing. Now that we have the official explanation, we can move on... I know I had a while ago.

Anyways, tonight's episode was great, plenty of action and some funny moments... but I'm really waiting for next episode, since apparently it has some future scenes. You can check the previews as always on this site:
http://terminatorcommercials.blogspot.com/