Grey’s Anatomy tonight was surprisingly good. The previews had show Derek’s one-night stand announcing she was pregnant and I have been annoyed. How cliche’ to have the couple finally get together only to have a pregnant girlfriend in the mix. But it turns out that the Grey’s Anatomy writers do have some sense and it was just a joke. When the chief announced at the end of the show that some changes would be made, I sensed they were talking about more than their faux doctoring. I think they might have been talking about plot. At least, I hope so. It’s a promising beginning to the season. Heroes. Ugh. Blah.…