Harrison

“ Dalek Sec: The Doctor will open the Ark!
The Doctor: Ha ha, the Doctor will not.
Dalek Sec: You have no way of resisting!
The Doctor: Mm, you got me there. [withdrawing the sonic screwdriver] Although, there is always this.
Dalek Sec: A sonic probe?
The Doctor: [with jocular bravado] That's screwdriver.
Dalek Sec: It is harmless.
The Doctor: Ohh, yes. Harmless is just the word: that's why I like it! Doesn't kill, doesn't wound, doesn't maim. But I'll tell you what it does do: It is very good at opening doors. [He pushes the switch and the doors explode inwards; Jake's squad and some Cybermen run in and open fire.] ”
― Russell T. Davies

“The Doctor: Rose... before I go, I just want to tell you: you were fantastic. Absolutely fantastic. And do you know what? [Pause] So was I!
[The TARDIS lights up with energy as the Doctor regenerates into his tenth incarnation.]
The Tenth Doctor: Hello! Okay— [The Doctor pauses and swallows uncomfortably] New teeth. That's weird. So where was I? Oh, that's right. Barcelona! [Grins]”
― Russell T. Davies

“Dalek: I will talk to the Doctor.
The Doctor: Oh will you? That's nice. Hello!
Dalek: The Dalek strategem nears completion. The fleet is almost ready. You will not intervene.
The Doctor: Oh really? Why's that, then?
Dalek: We have your associate. You will obey or she will be exterminated.
The Doctor: No.
Dalek: Explain yourself.
The Doctor: I said, "No."
Dalek: What is the meaning of this negative?
The Doctor: It means, "No."
Dalek: But she will be destroyed!
The Doctor: No! 'Cause this is what I'm gonna do. I'm gonna rescue her. I'm gonna save Rose Tyler from the middle of the Dalek fleet, and then I'm gonna save the Earth. And then—just to finish off—I'm gonna wipe every last stinking Dalek out of the sky!
Dalek: But you have no weapons, no defenses, no plan.
The Doctor: Yeah! And doesn't that scare you to death? Rose?
Rose: Yes, Doctor?
The Doctor: I'm coming to get you.”
― Russell T. Davies

“Cyber Leader: Daleks, be warned. You have declared war upon the Cybermen.
Dalek Sec: This is not war - this is pest control!
Cyber Leader: We have five million Cybermen. How many are you?
Dalek Sec: Four.
Cyber Leader: You would destroy the Cybermen with four Daleks?
Dalek Sec: We would destroy the Cybermen with one Dalek! You superior in only one respect.
Cyber Leader: What is that?
Dalek Sec: You are better at dying.”
― Russell T. Davies