Buchanan: [to Jack] We're asking you to sacrifice yourself.

Chloe: You were right about Curtis and Assad. Curtis was in the army, just after desert storm. His squad was ambushed by Assad's people. They killed 5 of Curtis's men and took 2 more hostage. Curtis was badly wounded, he couldn't go after them. The next day a tape was sent to the local television station. Assad's lieutenant forced the men from Curtis's patrol to beg for their lives, and then he personally beheaded them both.
Jack: Oh my God.

Curtis: I can't let this animal live!

Jack Bauer: Damn it!

Jack: Audrey?
Bill Buchanan: Audrey doesn't know you're back.
Jack: My daughter?
Bill Buchanan: Kim doesn't know, either.
Jack: You keep it that way.

Jack: Curtis, put down your weapon!
Curtis: I can't do that, Jack.
Jack: Curtis, by order of the President of the United States, PUT DOWN YOUR WEAPON!

James Heller: You're cursed, Jack. Everything you touch, one way or another, ends up dead.
Day 7

Karen Hayes: If we don't stop these attacks, this country will never recover.

Karen Hayes: There are people in this administration who are willing to tear up the Constitution in the name of National Security.

Liddy: It's Liddy. You won't believe who just called here.
Graem Bauer: Who?
Liddy: Your brother Jack.
Graem Bauer: What are you talking about? Jack's rotting away in some Chinese prison.
Liddy: No, actually he's here in L.A.
Graem Bauer: How the hell did that happen?
Liddy: I don't know.
Graem Bauer: What's he want?
Liddy: He's looking for the old man.
Graem Bauer: Yeah? Why?
Liddy: He didn't say. But if I were you, I'd expect a call from Jack. Your name came up.
Graem Bauer: Damn it. We should have killed Jack when we had the chance instead of handing him over to the Chinese.
Liddy: We tried.
Graem Bauer: This isn't good. My brother has a way of digging things up that need to stay buried.

Wayne Palmer: If Jack Bauer says it's a dead end, then it's a dead end.

[Ahmed directs Scott after receiving orders on the phone to kill him.]
Ahmed: Don't make this any harder than it already is. Kneel.

[As Omar begs through his pain, Jack pulls back from his brutal interrogation.]
Assad: Why'd you stop?
Jack: I can see it in his eyes. He's not going to tell us anything.
[Jack walks off, but Assad grabs a knife and resumes the torture.]
Assad: Where is Fayed?
Omar: I know where some of his men are going to be!
[Beat. Assad is alarmed at Jack's reluctance to head out after Fayed.]
Assad: My men are dead. I can find Fayed, but I cannot stop him by myself.
Jack: I don't know how to do this anymore.
Assad: You'll remember.

[Buchanan is livid over Chloe's rogue attempt to track Jack, jeopardizing the deal.]
Buchanan: Don't think you're the only one mourning Jack; you're not.

[Buchanan loudly reviews CTU's recent failures.]
Buchanan: We have to do better than we're doing, and we have to do it faster!