I'm fairly sure everyone knows about the 4 - there was the bit in the previouslies where you saw Sam and Tyrol being arrested (for want of a better term), so I'd imagine everyone found out then.

Possible that it was already known the 13th colony were cylons; I tend not to read a lot of BSG stuff online as I'm terrified of being spoiled!!

I thought this ep was just brilliant - as I said, I was convinced Dee was the fifth, right up til she picked up that gun! Last time I had this reaction to an ep was when Cally got airlocked!!