This isn't really an afterlife, it's just more life than you were expecting.

Seb

Dr. Chang: There is one horrible possibility that has never occurred to anyone throughout human history.
Clara: Don't say it.
Dr. Chang: The dead remain conscious. The dead are fully aware of everything that is happening to them.

The Doctor: That's a matrix data slice, the Gallifrey hard drive. Time Lord technology.
Missy: Imagine you could upload dying minds to that, edit them, rearrange them, get rid of all those boring emotions ready to be redownloaded. Meanwhile you upgrade the bodies. Download the mind, upgrade the body. Cybermen from cyber space. Now why has no one ever thought of that before?

Do you know the key strategic weakness of the human race? The dead outnumber the living.

Missy

This is it. The darkest day. The blackest hour. Chin up, shoulders back. Let's see what we're made of, you and I.

The Doctor

Clara: Clara Oswald is a cover story, a disguise. There is no Clara Oswald.
Cyberman: Identify.
Clara: Oh don't be so slow, it's embarrassing. Who could fool you like this? Who could hide right under your nose? Who could change their face anytime they want? Ha. See, I'm not Clara Oswald. Clara Oswald has never existed.
Cyberman: Identify.
Clara: I'm The Doctor.

The Doctor: Oh, don't do that. You look like you're self-concussing, which would explain all of military now that I think about it.
Col. Ahmed: Colonel Ahmed, sir. Privileged to meet you.
The Doctor: Love your outfit, Colonel Ahmed. Are you in the scouts? Are you a man scout? I didn't know they had those.

The Doctor: That's your answer for everything, isn't it. Vote for an idiot.
Kate: If you say so, Mr. President.

Throw away your guns, man scout. It's all over. How can you win a war against an enemy that can weaponize the dead?

The Doctor

It turns out the afterlife is real, and it's emptying. Every graveyard on earth is about to burst its banks.

The Doctor

Hey Missy you're so fine, you're so fine you blow my mind. Hey Missy! Hey Missy! Ha!

Missy

I made you a souffle, but it was too beautiful to live.

Oswin

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.