[GreenOgre]

Nope Balthar is a cylon.

Remember how 6 is in his head. He was in 6's head.

My guess is during the intial Cylon attack 6 and Balthar got killed and mixed a little when they downloaded. That's why Balthar was in 6's head when she was on Caprica.

[neodad]

I have thought all along that Tigh's wife is a Cylon. I think she'll show up again.

[discostu]

In the commentaries Ron said they function as the personification of each other's conscience. They really aren't in each other's heads, it's just how they settle moral quandries. Of course Ron also said there was no Adama in season 3, so he could just be screwing with us.