I've just watched the pilot of The Sarah Connor Chronicles. If you recognise the name, she's the mother from the Terminator movies.
The TV series is set 2 years after Terminator 2, where we find out that Sarah has been on the run, but finally settled down, and is now engaged. This spooks her, and she goes on the run again with her son, John.
In the new town, they are found by a Terminator, who tries to kill John, and just like the films there is someone to protect John. A female terminator, played by Summer Glau(Firefly, The 4400 & The Unit), who I think is a brilliant actress, and is perfect as the Terminator protecting John.
After getting over how different the actress is playing Sarah, I really enjoyed the pilot. I won't say anything else about the plot, but they do change some of the things we already know about the Terminator universe.
The Sarah Connor Chronicles airs January on Fox