Dr. Rodney McKay: Using power... using power... using power.
Carson Beckett M. D.: ...well if I've learned one thing, Mum, it's that we Earthlings are ver.
Lt. Aiden Ford, USMC: Doc! You can't say that.
Carson Beckett M. D.: What?
Lt. Aiden Ford, USMC: Earthlings. It's compromising security.
Carson Beckett M. D.: She knows I'm from Earth, son! It's not a bloody secret.
Dr. Rodney McKay: I'm not crazy. I just have another consciousness in my brain.
Maj. John Sheppard: So he just looks crazy.
Dr. Rodney McKay: I'm sure I do, but only because Dr. Fumbles McStupid over here was in way over his head.
Dr. Rodney McKay: You're referring to the ship you just shot down! One that doesn't stand a hope in hell of ever flying again.
Torrell: The ship that you're gonna fix, yes.
Dr. Rodney McKay: What am I, MacGyver? Fix it with what?
Maj. John Sheppard: There's plenty of time to solve this thing, but you got to stop using your mouth and start using your brain.
Dr. Rodney McKay: I think I chipped a tooth. Did I chip a tooth? Am I bleeding? Because I am at high risk of enterocarditis.
Maj. John Sheppard: "Get as far away from the nuclear explosion as possible." That's good advice, Rodney, thanks.
Colonel Marshall Sumner USMC: Go... to... hell.
Female Wraith: Earth first.
Zaddik: Are you interested in science?
Dr. Rodney McKay: I'm not sure that's what I would call this, but yes.
Maj. John Sheppard: Have you ever tried to clear a stump by hand?
Elizabeth Weir, Ph. D.: Yes, it's a hobby.
Commander Acastus Kolya: You killed two of my men.
Maj. John Sheppard: I guess we're even.
Commander Acastus Kolya: I don't like 'even'.
Dr. Rodney McKay: All I know is that she's not who she's pretending to be.
Elizabeth Weir, Ph. D.: And you know this because...?
Dr. Rodney McKay: What, I'm not allowed to have intuition?
Elizabeth Weir, Ph. D.: You? No.
Carson Beckett M. D.: How come I never make friends like that?
Dr. Rodney McKay: You need to get out more.
Carson Beckett M. D.: We're in another galaxy. How much more out can you get?
Maj. John Sheppard: This is what I do when I have problems with my laptop, I turn it off and then I... turn it on again.
Elizabeth Weir, Ph. D.: I think this is a little bit more complicated than that.
Maj. John Sheppard: I'm just saying that if we're taking a page from the John Sheppard book of computer repair, we're really desperate.
Carson Beckett M. D.: He fainted.
Dr. Rodney McKay: Oh there's gotta be a better word.
Carson Beckett M. D.: Faint is a proper medical term.
Dr. Rodney McKay: I passed out from... manly hunger.
Dr. Rodney McKay: Did I mention that I know almost everything about almost everything?
Dr. Rodney McKay: Well, let me see - we've got slow death, quick death, painful death, cold, lonely death.
Elizabeth Weir, Ph. D.: You think once the initial shock is over, we'll have the old Rodney back?
Carson Beckett M. D.: I'm afraid so.
Dr. Rodney McKay: So... just to confirm, we're all still... definitely not dead.
Dr. Rodney McKay: Maybe we should make a diversion.
Maj. Lorne: Are you volunteering?
Dr. Rodney McKay: I'll shut up.
Chosen answer: Because the ZPM allowing them to dial Atlantis was being used at the Antarctic defense outpost. They couldn't risk making Earth vulnerable to attack from Anubis by depleting it with repeated dialing to the Pegasus galaxy. Once they knew Atlantis was in serious danger, they had no choice.
Grumpy Scot
ZPM from Antarctic was depleted in first dial, dial in Siege was done via ZPM from Egypt (SG-1: Moebius Part-1/2).