In this episode we saw that the Arrow of Apollo opened the Tomb of Athena, which led to a map to Earth. The map was a collection of gems representing the constellations of the Zodiac. Starbuck realized that Earth must be the place where one can see all twelve of the constellations at once.
Sharon: (points a gun at Adama) I need you to know something. I'm Sharon, but I'm a different Sharon. I know who I am. I don't have hidden protocols or programs lying in wait to be activated. I make my own choices. I make my own decisions and I need you to know that this is my choice.
Helo: How much further?
Sharon: "Farther" describes actual distance. "Further" is more figurative.
Helo: You're a dictionary now?
Sharon: I'm sorry I'm smarter than you.
Starbuck (muttering): Stupid frakkin' thing couldn't come with a handbook? No, because that would be too logical.
Roslin (quoting the Book of Pythia): "And the Arrow of Apollo will open the Tomb of Athena".
Starbuck: Yeah, well unless anyone sees a keyhole or, whatever, then we're either in the wrong place or we're perfectly screwed.
Baltar: Then who, or what, are you, exactly?
Number Six: I'm an angel of God sent here to protect you, to guide you and to love you.
Baltar: To what end?
Number Six: To the end of the human race.
(Looking through the bars of a cell, Baltar turns and sees No. 6 sitting naked, straddling the chair)
Baltar: Oh - you decided to brighten up the place a little, did you?
No. 6: Our child will be born here, in this room. (pauses) You're not listening!
Baltar: Oh, do you notice? No, I've had enough. Do you seriously expect me to listen to you when you sit around stark naked?
Apollo: You know, we should keep an eye on [Helo], too.
Starbuck: Helo's a friend of mine, alright? He's one of the good guys.
Apollo: Yeah? Sharon was a friend of yours, too.
Adama: She thinks you'll be President one day.
Billy: 'Scuse me?
Adama: That's what she said to me once, that you reminded her of President Adar when he ran for his first office.
Billy: I don't really know how to respond to that, sir.
Adama: Don't let it go to your head. Adar was a moron.
When Baltar first speaks with Number Six in the holding cell, she is completely nude. After she appears in a jogging outfit and a different hairstyle, Baltar addresses her as Sara, suggesting that this was the name she used on Caprica.
Number of Survivors: 47,855
In the map room of the Tomb of Athena, Apollo identified the Lagoon Nebula. Also known by the astronomical catalog numbers M8 and NGC 6523, it is a cloud of interstellar gas 5,200 light-years from Earth, believed to be a breeding area for new stars. It is faintly visible to the naked eye in the constellation of Sagittarius.