Despite the weekly promise in the credits that ONE WILL BE REVEALED, Battlestar Galactica is taking its sweet time in divulging which character is the twelfth humaniform Cylon model.

Producer Ron Moore stated that the final Cylon was not pictured in the "Last Supper" Season 4 promotional photo. Apart from the known Cylons, it depicted Laura Roslin, Lee Adama, Gaius Baltar, Kara Thrace, Karl Agathon and William Adama.

Of the regular characters, that leaves Felix Gaeta and Anastasia Dualla; recurring characters include Dr. Cottle and Tom Zarek, plus all the Viper pilots.

Moore also said that hints as to the Cylon's identity had been dropped throughout the series. With that in mind, I read through their biographies on the Battlestar Wiki. The two strongest possibilities are Gaeta and Dualla.

First, there's Dualla's name. Anastasia, according to the wiki, is ancient Greek for resurrection, and her last name may derive from Latin dualis (two, duo, dual; of two parts) - certainly suggestive of a Cylon masquerading as human, at the very least. Also, she conspired with Saul Tigh and Tory Foster, two of the Final Five (though neither of them knew it yet), to rig the election between Baltar and Roslin. And only four of the eleven known models are female. She hasn't had much screen time this season; holding her back for a surprise reveal? Or focusing attention on more important characters?

Gaeta is extremely good with computers - on more than one occasion proposing technological courses of action which seemed novel to his coworkers (parallel processing, firewalls, wiping the drives and reloading from backups). On New Caprica, he ferried information to the Resistance (led by three of the Final Five). And at the end of the most recent episode, he bore more than a passing resemblance to the Hybrids within the Cylon base stars: lying immobile, taking no heed of anyone around him, while singing a song containing apparent nonsense phrases amongst the narrative. And his leg would make a good parallel with Tigh's eye.

So, I don't know. I'm pretty sure it's one of those two. Assuming, of course, that there aren't thirteen models, one for every human colony. If it isn't revealed in next week's half-season finale, I guess I'll just have to Netflix the first three seasons and re-watch them for clues.

Who do you think it is, if you watch the show?