Tyrol: ...You know, we need to figure out who's side we're on.
Tigh: Which side are we on? We're on the side of the demons, Chief. We're evil men in the gardens of paradise, sent by the forces of death to spread devastation and destruction wherever we go.

Virtual Leoben: See, there's nothing so terrible about death, when you finally face it...it's beautiful. You're free now... to become who you really are.
Kara: [smiling] You're not Leoben.
Virtual Leoben : Never said I was. I'm here to prepare you to pass through the next door. To discover what hovers in the space between life and death.

Virtual Six: Don't make me angry, Gaius.
Adama: You wouldn't like her when she's angry.
Roslin: I've always wanted you.
Baltar: Oh no.
Roslin: What?
Baltar: I'm dreaming, aren't I?
Roslin: Yes, you are. [kisses him]

William Adama: I've been going through Cain's log and from a tactical perspective it's hard to find fault in anything she did. Or that Kendra Shaw did.
Lee Adama: They butchered innocent civilians, Dad. Come on. How can you ignore that?
William Adama: I know that I didn't have to face any of the situations that she did. I had the President in my face, arguing for the survival of the civilian fleet. I've Colonel Tigh keeping me honest, balancing my morality and my tactics. And I had you. Now...you don't have any children, so you might not understand this, but you see yourself reflected in their eyes. And there are some things that I've thought of doing with this fleet, but I've stopped myself, because I knew I'd have to face you the following day.
Season 4

[Adama and Apollo argue after the assassination attempt]
Adama: What the hell were you doing out there? I gave you an order. To do a job.
Apollo: Excuse me, I was doing my job.
Adama: Yeah, being led around by the nose! That bastard yanked your chain and you jumped.
Apollo: He wanted files from the Colonial One.
Adama: It was the middle of the night.
Apollo: You assigned me to security.
Adama: Yeah. And there was a bomb on that ship and you missed it.

[Adama and Tigh discuss the food shortage]
Adama: I hear they're still eating paper. Is that true?
Tigh: No. Paper shortage.
[The two break down into helpless laughter]

[Apollo details the security policy]
Apollo: You take a good look at this room. Every time you leave, memorize it. If anything changes, don't touch it. A book moves, shoes in a wrong place, something smells different, you get the frak out. Someone knocks, don't answer the door, don't open the door. Look, you have to do what I say.
Lampkin : If they wanna kill me, they'll find a way. Now, who do I have to bribe to see the Cylon woman?

[As a Three moves along the lines, congratulating graduates into the New Caprica Police]
Lieutenant Tucker "Duck" Clellan: [referring to his dead wife] I'll see you soon, Nora. [detonates his explosive vest]

[As the four newly-revealed Cylons aboard Galactica struggle to deal with the information, the call to action stations sounds]
Lieutenant Felix Gaeta: [over the loudspeaker] Inbound Cylon fleet! I repeat: action stations, action stations. Set Condition One throughout the ship. This is not a drill.
Tory Foster: Oh gods... what're we going to do?
Saul Tigh: The ship is under attack. We do our jobs. Report to your stations!
Galen Tyrol: Report to stations?
Tigh: My name is Saul Tigh. I am an officer in the Colonial Fleet. Whatever else I am, whatever else it means, that's the man I want to be. And if I die today, that's the man I'll be.

[Baltar and Lampkin are discussing options after Roslin's testimony with Lee idly listening to them]
Baltar: We need to find something, anything that can discredit her testimony. She's a fanatic, right. I don't know if that's gonna..
Lampkin: [glances at Lee] You're awfully quiet.
Lee: Just listening.
Lampkin: You see, your problem is that I'm a really good liar and you're not. So let's have it.
Lee: Have what?
Baltar: My gods he's right, you do know something. You know something and you're not saying.
Lee: It's probably not even true.
Lampkin: I like it already.

[Baltar and Lampkin are discussing the upcoming trial]
Baltar: Caprica Six. I'm worried about her. She's the key. They can use her to completely destroy me. We need to get to her. We need to know what she's thinking. We need to.. talk to her. Tell her.. Tell her that I love her very much. I am thinking about her a lot.
Lampkin: I can sense that, yes.

[Baltar and Three confront the Hybrid]
Hybrid: [Suddenly grabs Baltar's hand] Intelligence! A mind that burns like a fire!
Baltar: Yes, I'm here.
Hybrid: Find the hand that lies in the shadow of the light, in the eye of the husband of the eye of the cow. [Baltar removes his hand from the Hybrid's tank.]
Three: You all right? It just speaks nonsense, doesn't it?
Baltar: I don't think anything she says is nonsense.

[Baltar talks religion with D'Anna while she takes a short break from torturing him.]
Baltar: I'm a scientist. And as a scientist, I believe if God exists, our knowledge of him is imperfect. Why? Because the stories and myths we have are the products of men, the passage of time. The religion you practice is based on a theory, impossible to prove. Yet you bestow it with absolutes like, "There is no such thing as coincidence."
D'Anna/Number Three: It's called faith.
Baltar: Absolute belief in God's will means there's a reason for everything. Everything! And yet you can't help ask yourself how God can allow death and destruction. And then despise yourself for asking. But the truth is, if we knew God's will, we'd all be gods, wouldn't we??

[Breaking the fourth wall]
Hybrid: Throughout history, the nexus between man and machine has spawned some of the most dramatic, compelling, and entertaining fiction.

[Defense attorney Romo Lampkin's letter to Gaius Baltar]
There is no greater ally, no force more powerful, no enemy more resolved, than a son who chooses to step from his father's shadow.