I think they gave Romo way too many jobs for one guest star to carry. He had to guide the audience (quite unneccessarily) through accepting Lee's appointment, nudge Adama Snr into backing down from sending the whole fleet after his girlfriend and be the psycho to test Lee's President fu at gunpoint.

The promo pointing to Roslin as the fifth looks like a fake cut but I still say its more interesting what they are than who. What's the relationship between their Opera House forms and their bodily incarnations? If they're from Earth when and how did they get here? The Opera House was on Kobol so where does that fit in with the Earth timeline?And so on and so on...