Set sometime early in the series. It's all in your head, Dr. Baltar -- isn't it? Warning for dreadful attempts at humor.
You're Hearing Things, Baltar
(tune: "The Sounds of Silence")
Hello Baltar, my old friend
I'm meddling with your mind again
Ever since the day Caprica died
There's been no place that you could run or hide
For wher'ere you go, you see my face, and hear my voice
You've no choice
You hear the sound -- of Cylons
I interrupt you when you talk
And pinch your bottom when you walk
Some of the crew think you're a crazy clown
They've walked in on you when your pants were down
And it looked like you were humping empty air
No one there
They heard no sounds -- of Cylons
But foolish Baltar, don't you know
Just how our power o'er you will grow
We're starting out with gropes in corridors
But of your heart and soul we're claiming more
Someday, we'll make you human president
With your will spent
You'll mouth the sounds -- of Cylons