Chances are, you're already a Battlestar Galactica viewer, unless you hate goodness or something, but just in case you weren't planning on watching tonight's episode, change your plans. "The Passage" is the first episode of the series scripted by the inestimable Jane Espenson, and promises to be a winner. (Now, she'll have her work cut out for her to top last week's ballbuster of an episode, but I've got nothing but faith.)