Well, I'm more convinced that Jessie is really dead. Actually, as I thought about it today, it made more sense to me. Derek made a good point by bringing up Andy Goode. If they were that close and Derek was willing to come back and kill him for the sake of the future, then I'm sure he'd be willing to kill Jessie since she was screwing with none other than John Connor himself. That's a dangerous game to be playing.
Tonight's episode appears to have accounted for another of the rumored "deaths of loved ones."
I'm pleased that they managed to bring Miles Dyson's work back into the story. I get the feeling the guy who was trying to cut out Cameron's chip was talking to an AI. Also, didn't Cameron's reboot time seem a little quicker than normal? What was it last season? 180 seconds?