Something has changed...that is the theme of the episode. The dynamic of the Cylons have changed. For the first time there is real dissention among the Cylons. One of the Sharons has turned against others. The raiders have been dumbed down and the Centurians have been given free will. There is dissention among Roslin and Adama. They are both afraid of losing each other and of being wrong. Something has changed between them and they are fighting over what to do about Starbuck. Four of the final five have been revealed and they know something has changed but they aren't sure what and they are try desperately to keep there secrets. Tigh sends Tory off to get info from Baltar and she has sex with him when he talks about hearing music.
Something has changed for Lee as well. He wants a change and has decided to search out a new life.
The overriding theme of the episode is, something has changed, but has it changed for the better....or the worse?