The ending is probably what viewers are going to remember about this episode, with Tigh, Chief Tyrol, Anders and Tory appearing to make up 4 of the Final 5 cylons.
I'm not wholly convinced that this makes complete sense, given the limited knowledge we have about the Cylons, but I'm defintely up for having it explained next Season.
I'm wondering whether this means that the Chief's and Kelly's baby is another Human/Cylon hybred? Where Starbuck fits also remains a mystery to me, but I may have missed something. I hope that she will not be the last Cylon. It does seem reasonably obvious that Earth will be discovered quite soon in to Season 4. I'm still open as to whether this will turn out to be a good thing or a bad thing, I just hope there won't be any scouts leaping 30 feet in the air...
Roll on 2008.