Jack (after failing to save Colleen): Time of death... (realizes that there is no clock) She's gone.

Jack: [After explaining what the surgery for Ben's cancer will entail] You need to be in surgery yesterday.
Ben: Alright then, whatever you need, it's yours. I'm ready.
Jack: No, I think you misunderstood me. I didn't say I was gonna do it. I just wanted you to understand how you're gonna die.[Ben and Juliet are astonished] You think I believe you people? You think I trust you? You think I'm just going to do the surgery and then I'm just gonna hope that you let me go?!
Juliet: Jack!
Jack: NO, DON'T!
Ben: Well Jack, I'm very disappointed in your decision.
Jack: Well Ben, at least you won't have to be disappointed for very long.

Jack: [screaming at the top of his lungs] TELL ME WHERE MY FRIENDS ARE!!!!!!!!!!!!!!

Jack: Better get going. Rousseau said it's about a day's walk up to the radio tower.
Sayid: I'm not taking them up to the tower--you are.
Jack: Excuse me?
Sayid: You're not staying behind.
Jack: This was my idea.
Sayid: And I'm perfectly capable of executing it.
Jack: I owe them!
Sayid: What are you more concerned about: killing the Others or getting our people off this island? This afternoon you said you were our leader. It's time for you to act like one. Lead them to the radio tower, Jack and then take us all home.

Jack: Sawyer, it's a suicide mission without guns.
Juliet: I know where there are some guns. Ethan left a stash near the beach.
Jack: Juliet, you don't have to do that.
Juliet: Yeah, Jack, I kinda do.
Sawyer: Let's do this.
Jack: Don't do anything stupid.
Juliet: I won't if you won't.
[They kiss]

Jack: Tell me
Kate: Tell you?
Jack: The first day on the beach, the day of the crash, the story that I told you. If you're safe, tell me.
Tom: Do you think this is the best time?
Jack: Shut up!
Kate: You were doing surgery on a girl, and you messed up. You made a mistake. You tore something on her back, and all the nerves came loose. And you said the fear was so... real. And you didn't know what to do. So you counted to five.. [Kate starts to cry] And then you weren't afraid anymore. And then it was just gone. And you fixed her, you saved her.
Jack: (after a pause) I need you to make me a promise, Kate.
Kate: Jack-
Jack: Promise me that you'll never come back here for me. Don't come back, Kate.
[Ben wakes up mid-surgery]

Jack: What are you DOING HERE!!!!!!

Jack: When Juliet told me they were coming, the first thing I thought was: where the hell are we going to hide this time? But hiding's pointless; they're just going to keep coming back, so I went out and I found some help. And for the past few days, she's been bringing dynamite back from the Black Rock. For the very first time, we know exactly what they want, when they're coming to get it and they have no idea. We're going to be waiting for them. So Juliet's going to mark the tents with the white rocks just like she was told to, but there's not going to be any pregnant women inside; there's going to be plenty of what we just used on that tree. So tomorrow night, we stop hiding, we stop running, we stop living in fear of them, because when they show up, we're going to blow them all to hell.

Jack: Why don't you get my father down here? If I'm drunker than he is, then you can fire me!

Jack: [To Kate] I will come back here for you.

Juliet: I'm a fertility doctor. I'm not used to death.

Juliet: It doesn't work that way over here Jack, we make decisions together.
Jack: Really? Because when I was holding that broken plate to your neck, he seemed happy to just let you die. It seemed like he made that decision alone.

Juliet: I hear you only liked them grilled.
Jack [Smiles]: I missed the toothpicks too.
[Juliet gives him the sandwich]
Jack: Let me see.
Juliet: Jack...
Jack: They marked you? Let me see.
[Juliet shows him her mark]
Jack: If you would break off that aloe plant there...
Juliet: It's ok, Jack.
Jack: Please, please do it.
[Juliet breaks off a piece, and Jack puts it on her back, their hands almost touching]
Juliet: Why did you help me?
Jack: He told you that you could leave the island. He told me the same thing. We're going to make sure he keeps his promise.
Juliet: We're? How are we going to do that?
Jack: Together.

Juliet: What do you do, Jack? What's your profession?
Jack: I'm a repo man. You know, when people don't pay their bills I go into the bank and collect their possessions. I'm a people person so I really love it.
Juliet: Are you married?
Jack: No. I never saw the point. What about you? What's your job, besides making sandwiches?
Juliet: Oh, I didn't make it. I just put the toothpicks in.

Kate: Hey.
Jack: Hey.
Kate: [after a pause] Saw you on the news. Still pulling people out of burning wreckage, huh.
Jack: Old habits.
Kate: You look terrible.
Jack: [laughs] Thanks.
Kate: Why'd you call me, Jack?
Jack: [displaying the as-yet unknown obituary] I was hoping that you heard... that you would go to the funeral.
Kate: ...Why would I go to the funeral?
Jack: [after a long pause] Been flying a lot.
Kate: What?
Jack: That golden pass they gave us? Been using it. Every Friday night I fly from L.A. to Tokyo... or Singapore... or Sydney. I get off... have a drink... fly home.
Kate: ...why?
Jack: Because I want it to crash, Kate. I don't care about anyone else on board. Every little bump we hit, turbulence... I actually close my eyes, and I pray... I pray that I can go back.
Kate: This is not going to change...
Jack: No, I'm sick of lying. We made a mistake.
Kate: I have to go. He's going to be wondering where I am.
Jack: We were not supposed to leave.
Kate: Yes, we were. [she begins to leave and get in the car]
Jack: We have to go back, Kate. [the car pulls away] We have to go back!
[A plane takes off behind Jack as the episode ends]
Season Four