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 Season 9 Quotes

What have we got? What do we know? It's not an attack. It's not an invasion because, well that doesn't come with a fair warning. So, somebody needs our attention. Somebody who needs to put a gun to our heads to make us listen.

Clara

The Doctor: Tell me the name of the boy who isn't going to die today.
Boy: Davros. My name is Davros.