Tricia Helfer

Let's get out our checklist for the Jan. 16 premiere of the last season of Battlestar Galactica: Raptor, check. Flight suit, check. Beige eye-patch, check. The final Cylon... We have no frakkin' idea! We need help, BSG fans. We have our own theories on who the last Cylon could be, but we want expert fan opinions as well.

Who do you think is the last puzzle piece to complete the final five? We know Ron Moore has said that the final Cylon is not a one of the main characters (but who knows if that's true), so who could it be? And, why didn't the 12th Cylon come when the signal sounded? Does that mean the final Cylon was not on the ship when the signal alerted Tigh, Tori, Anders and Tyrol?

Could No. 12 be someone we've never met, or thought was dead (Zach Adama, Ellen Tigh)? Or, could it be someone who has recently come to the forefront of BSG storytelling (Gaeta, Hoshi)?

Check out our photo gallery about the first 11 Cylons to refresh your memory and make sure to give us your take on who you think is lucky No. 12.