Bill: Where are you going?!
The Doctor: It’s a giant smiley abattoir over there, and I’ve a very childish impulse to BLOW IT UP! Be right back!

The Doctor: Okay. I suppose I owe you an explanation. A long time ago, a thing happened. As a result of the thing, I made a promise. As a result of the promise, I have to stay on Earth.
Bill: Guarding a vault.
The Doctor: Guarding a vault!
Bill: Well, you’re not guarding the vault right now.
The Doctor: Yes, I am! I have a time machine! I can be back before we left!

Bill: So. Back up to your office for a cuppa, then?
The Doctor: Between here and my office, before the kettle boils, is everything that ever happened or ever will!

Nardole [sees Bill]: Why is she here?
The Doctor: Because she isn’t anywhere else.

Nardole: Excuse me? What *is* the TARDIS doing down here?
The Doctor: I’m over two thousand years old. I don’t always want to take the stairs.

You don’t “steer” the TARDIS! You *negotiate* with her! The still point between where you want to go and where you need to be. That’s where she takes you.

The Doctor

I’m not stupid, you know. You don’t think anyone’s seen a movie? I know what a *mind wipe* looks like!

Bill

Bill: What changed your mind?
The Doctor: Time.
Bill: Time?
The Doctor: And Relative Dimension In Space. It means, “What the hell?”.

Hunger looks very much like evil from the other end of the cutlery. Do you think your bacon sandwich loves you back?

The Doctor

Bill: Doesn’t make sense then!
The Doctor: What doesn’t?
Bill: “TARDIS”! If you’re from another planet, why would you name the box in English? Those initials wouldn’t *work* in any other language!
The Doctor: People don’t generally bring *that* up.

Nardole [about the TARDIS]: First, you have to imagine a very big box fitting inside a very small box.
Bill: Okay!
Nardole: Then, you have to *make* one! [beat] It’s the second part people normally get stuck on.

The Doctor: This is the gateway to everything that ever was and ever can be.
Bill: ...Can I use the toilet?

Doctor Who Quotes

There's a horror movie named Alien? That's really offensive. No wonder everybody keeps invading you.

The Doctor

The Doctor: It's a risk.
Graham: Oh, like none of our other trips have ever been risky.
The Doctor: I have apologized for the Death Eye Turtle Army! Profusely.