It's a killer puzzle box designed to scare me to death, and I'm trapped inside it. Must be Christmas.

The Doctor

And I'm gonna explain to you how I survived. I can't wait to hear what I said. [breaks the fourth wall, glancing at the camera] I'm nothing without an audience!

The Doctor

If you think because she is dead, I am weak, you understand very little. If you had any part in killing her, and you are not afraid, then you understand nothing at all. So for your sake, understand this -- I am the Doctor, and I'm coming to find you. And I will never, ever stop.

The Doctor

You’ll find that it’s a very small universe when I’m angry with you.

The Doctor

You will not insult my memory, there will be no revenge. I will die, and no one else here or anywhere will suffer.

Clara

Clara: That man's wife, she said something. Give it to me. Tell me I can have it. What did she mean?
Rump: Two ways to survive a quantum-shade. The shade's master removes the chronolock or you can give it to someone else.

Clara: Okay, we split up. Cover more ground. I'm good cop, you're bad cop.
The Doctor: No no no we don't have... Can I not be the good cop?
Clara: Doctor we've discussed this; your face.
The Doctor: Oh yeah yeah.

Ashildr/Me: I don't want your TARDIS. That's not what this is about. Rigsy come here, I'll remove your chronolock.
The Doctor: What is this Ashildr? You can't possibly think this is going to keep me here.
Ashildr/Me: It's not a restraint. It's a teleport bracelet.
Clara: What?
Ashildr/Me: I'll give you time to say goodbye, don't worry. No one will be hurt.

Rigsy: You're serious? You actually expect me to give you my death sentence?
Clara: I've always wanted a tattoo. You know, something small. Discreet.
Rigsy: Clara, cut it out.
Clara: Why aren't you listening? I'm under the Mayor's personal protection and it's absolute, apparently. Look she controls the raven, so I will never have to face it.

Clara: Ashildr?
Ashildr/Me: Ashildr?
The Doctor: That's your name. I keep telling you that.
Ashildr/Me: Do you? Infinite lifespan, finite memory. It makes for an awkward social life.

Clara: What now? We can't stay in here, we're going to freeze to death. We can't go back out there because the sandmen will get us.
The Doctor: Sandmen?
Clara: Yeah it's a good name. Fits, like the song.
The Doctor: No no no no you don't get to name things. I'm the Doctor. I do the naming.

What used to be sleep in your eye, has turned into a carnivorous life form.

The Doctor

Doctor Who Quotes

Great men are forged in fire. It is the privilege of lesser men to light the flame. Whatever the cost.

Warrior Doctor

The Doctor: Clara? You asked me what we're going to do, I told ya. We're going to go to hell, or wherever it is people go when they die, if there is anywhere. Whatever it is we're gonna go there and we're gonna find Danny. And if it is in any way possible, we're going to bring him home. Every culture has a concept of an afterlife. I always meant to have a look around, see if I could find one.
Clara: You're going to help me?
The Doctor: Well, why wouldn't I help you?
Clara: Because of what I just did, I just...
The Doctor: You betrayed me. You betrayed our trust, you betrayed our friendship, you betrayed everything that I've ever stood for. You let me down!
Clara: Then why are you helping me?
The Doctor: Why? Do you think that I care for you so little that betraying me would make a difference?