The Doctor: His life force is opening a portal.
Me/Ashildr: To my new life.
The Doctor: Or to Hell.

The Doctor: Ashildr.
Me/Ashildr: That's not my name. I don't even remember that name.
The Doctor: Well, what do you call yourself?
Me/Ashildr: Me.
The Doctor: Yes. You. There's nobody else here.
Me/Ashildr: No. I call myself, Me. All the other names I chose died with whoever knew me, Me is who I am now. No one's mother, daughter, wife. My own companion. Singular. Unattached. Alone.

Go. Now. Go find Vikings on other planets. The universe is full of testosterone. Trust me, it's unbearable.

Clara

Ashildr: You think they're all idiots, don't you?
The Doctor: What, you mean the rest of the universe? Basically, yes I do.
Ashildr: But they're kind and brave and strong. And I love them.
The Doctor: Good, but that won't save you.

I looked them up in my 2000 year diary. They are called The Mire. They are one of the deadliest warrior races in the entire galaxy, but they're practical. They get what they want and then they go.

The Doctor

What is a God but the cattle’s name for farmer? What is heaven but the gilded door of the abattoir?

Odin

A good death is the best anyone can hope for, unless you happen to be immortal.

The Doctor

Winning is all about looking happier than the other guy.

The Doctor

Clara: You're always talking about what you can and can't do, but you never tell me the rules.
The Doctor: We're time travelers. We tread softly. It's okay to make ripples, but not tidal waves.

Doctor, such an honor. I've always been a huge admirer. This is really a delight. Finally, someone worth talking to.

The Doctor

Here's the thing, the messages my ghost gave they weren't for you. They were for me. That list, everyone after you was random, but you being the next name that's what made me confront the Fisher King.

The Doctor

This isn't about saving me, I'm a dead man walking. I'm changing history to save Clara.

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.