Perhaps the best episode I've seen so far for Battlestar Galactica was Exodus II. Now if you have not seen the episode and are currently following the story, do not read any further.

I was sitting on the edge of my seat the whole way through as I watched this amazing rescue happen. Galactica was doing it on its own, and then it was cornered and I thought oh no its over the Galactica is gone. Then here comes the Pegasus to save the day. All I can say is wow with all the action, unfortunately the Pegasus was destroyed, but it saved Galactica and the colonist that were escaping. I really thought Apollo was going to die, but he didn't I guess it was the way the preview was presented, it got me hook line and sinker.

If you are not watching this show, I highly recommend, its the best Sci-Fi series out there right now in my opinion.