All of series 4 (series 4)

Chloe O'Brien: When we find the nerve gas and the alert level drops, we can have some chamomile tea and I'll tell you all my secrets, okay?

Across whole show

[Jack and Tony are talking over a cellphone. Jack is trying to convince Tony not to kill Christopher Henderson]

Jack: Tony! This won't bring back Michelle.

Tony: I know, but it will make me feel better.

Jack: Trust me, you won't.

Tony: Yeah, I probably won't. I'll let you know.

Jack Bauer: the only reason you're still concious is because I don't want to have to carry you.

Day 6: 10:00 AM - 11:00 AM (series 6)

Graem Bauer: Actually, you're hurting me right now.

Jack Bauer: Trust me. I'm not.

Day 6: 9:00 AM - 10:00 AM (series 6)

Bill Buchanan: We have to do better than we're doing, and we have to do it faster!

Day 6: 8:00 AM - 9:00 AM (series 6)

Hamri Al-Assad: I do not work with my enemies.

Jack Bauer: You're working with one now.

Day 2: 5:00 A.M.-6:00 A.M. (series 2)

Sherry Palmer: Who are you calling?

Jack Bauer: CTU. I am a sworn Federal agent, Mrs. Palmer. You just confessed to a federal crime.

Day 3: 2:00 P.M.-3:00 P.M. (series 3)

[Jack has just shot Nina in the stomach, knocking her to the floor.]

Jack Bauer: You don't have any more useful information, do you, Nina?

Nina Meyers: [inching towards her gun] I do...I do.

Jack Bauer: No, you don't. [Shoots Nina three more times.]

Day 6: 6:00 AM - 7:00 AM (series 6)

Jack Bauer: Do you understand the difference between dying for something and dying for nothing? The only reason I fought so hard to stay alive in China was because I didn't want to die for nothing. Today, I can die for something.

9:00 A.M.-10:00 A.M. (series 1)

Jack Bauer: I used to be in the military. Used to do field work for the CIA. I've been to some horrible places. I've seen some pretty terrible things. I don't think I've ever been this scared in my whole life.

All of series 1 (series 1)

Jack Bauer: I've killed two people since midnight. I haven't slept in over 24 hours. So maybe you should be a little more afraid of me than you are now.

Across whole show

Andre Drazen: If Plan A fails you go to Plan B, not Plan A recycled.