If you stop to try to figure out time travel plots from TV shows and movies - whether it's Back to the Future, Star Trek, or Frequency - it can really give you a headache. So many things about time travel just don't make sense, but that doesn't mean that it doesn't make for a fantastic plot device.

I've been thinking about that since Terminator: The Sarah Connor Chronicles started. The show is supposed to take place after T2, though it's been a while since I've seen that flick (or the original for that matter) and I'm not sure if everything goes together and makes sense or not (T3 seems to be ignored, at least for now). But Todd Seavey is doing an extensive examination of the show and has come up with some interesting observations.