Hammond: I'd like you to take this note along with you. Keep it in your breast pocket until you get on the other side. It's fairly self-explanatory.
Carter: Sir, is everything all right?
Hammond: Everything's fine. Time to ship out, Captain.

O'Neill: You know, this looks suspiciously like the butt-end of a Titan missile.
Overhead: Standby for test burn in T-minus twenty seconds.
Teal'c: What is a "test burn"?
O'Neill: Just what it sounds like.

O'Neill: How'd you know that would work?
Teal'c: I did not.

Sergeant: The major wants all this stowed for transport, sir.
Hammond: What is it?
Sergeant: My orders are to forget I ever saw it, sir. So I'm afraid I don't know what you're talking about.

Jackson: We're the first people in human history to go back in time... well, for all we know. If we could figure out how to do this again, just think of what we could do. We could actually visit Babylon. We could, we could— We could see the Great Wall of China being built.
Teal'c: Or prevent regrettable events from your history from ever occurring.
Carter: No. That's exactly what we can't do.
O'Neill: Why not?
Carter: Because of the Grandfather Paradox. If you went back fifty years and murdered your own grandfather, your own father would never have been born.
Jackson: So you're saying that if we change our own past...
Carter: We could change our world in ways we can't possibly imagine. We might even cease to exist. Along with everything and everyone we know.

O'Neill: This is a top secret facility. Anonymity does not go over big here.
Carter: We cannot tell them we're from the future, sir.

An officer asks them (in Russian) if they're spies.
Jackson: Nyet.
O'Neill: Daniel?
Jackson: He just asked if we were Soviet spies. I just— realizes the problem
Guard: Come with me.
O'Neill: Sure. You bet. {on the way out} Nyet?

Thornbird: I'm Major Robert Thornbird. And you are?
O'Neill: Captain James T. Kirk of the Starship Enterprise.
Thornbird: Your dog tags say otherwise.
O'Neill: They're lying.
Thornbird: Your American accent is very impressive, Mr. Kirk. Before we ship you out and hand you over to wherever it is they take spies such as yourself, I wanted a word. Your little incursion into our training facility is going to leave an embarrassing mark on my record.
O'Neill: Training facility?
Thornbird: You don't think we'd test fire a real missile twenty-eight floors inside a mountain, do you?
O'Neill: Listen, you don't have the exact date—
Thornbird: What was the weapon you used?
O'Neill: Weapon?
Thornbird: Our cameras saw some sort of weapon.
O'Neill: Oh. Well, it's hard to say.
Thornbird: Some sort of state secret?
O'Neill: No, just difficult to pronounce.

O'Neill: I'll be honest with you, Bob. My name is not Kirk. It's Skywalker. Luke Skywalker.

O'Neill: Listen, I don't know where we're headed but they'll probably try to split us up. So we're not going to have much time to—
Carter: Escape and hopefully live out the rest of our lives without affecting history.
O'Neill: Or?
Carter: I can't think of an "or" at the moment, sir.
Jackson: No "or"?
O'Neill: There's an "or."
Jackson: There's an "or"?
Carter: Sir, you can't just will something to happen because you want it to be a certain way.
O'Neill: Captain, where there's a will there's an "or."

Hammond: Before I can even think of doing what's asked of me in the note, I need to know who you are. And who gave it to you.
Carter: Oh my god. My name is Samantha Carter and you gave me the note, sir. Sir, before we left General Hammond gave me a note and told me to keep it in my vest pocket until I got to the other side.
Hammond: It's addressed to me. In my handwriting.
O'Neill: What's it say?
Hammond: "Help them".

Jackson: So what's the plan?
O'Neill: Find the Stargate.
Jackson: That's the plan? "Find the Stargate"?
O'Neill: Elegant in its simplicity, don't you think?

Carter: In order to preserve our past Catherine has to meet you years from now.
Jackson: So we go in disguise. Pretend to be... foreigners.
O'Neill: How are you going to do that?
Jackson: Well I speak twenty-three different languages. Pick one.

Teal'c on hitchhiking: This method appears to be ineffective. {he jumps out of the culvert and stares down a van}
O'Neill: Teal'c? Teal'c! What are you thinking?
Teal'c: That it is effective, O'Neill.

O'Neill: Listen we've got gas money. Where you headed?
Michael: Upstate New York. Some big concert.

Michael: We're even thinking of crossing the border up to Canada.
Teal'c: For what reason?
Michael: You know, man. The war.
Teal'c: The war with Canada.
Michael: No.

Cassie: Hello, Jack. Teal'c. Daniel? I hardly recognized you with hair!
O'Neill: Do... Do we know you?
Cassie: Sam will recognize me. Come closer.
Carter: Oh my god. Cassandra!
Cassie: Dear Sam.
O'Neill: Excuse me, who is this?
Carter: Cassandra.
O'Neill: Cassie's thirteen years old.
Cassie: Not anymore, Jack. I've been expecting you my whole life in fact. You entered the Stargate a few seconds too soon. So the flare threw you far into the future.

Cassie: I will tell you this. Your journey's just beginning.

Carter: Then you've been waiting for this to happen.
Hammond: Ever since we met. I almost didn't let you go.
Carter: But if you didn't, you would have changed your own history.
Hammond: It's going to be a long debriefing, people. We'll start in one hour.
O'Neill: Yes sir.
Hammond: Oh by the way, Colonel. With interest, you owe me five hundred thirty-nine dollars and fifty cents.
O'Neill: Yes sir.