THE HYPNOTISING CAT: You are under my command. Jump into that puddle behind you.

DOCTOR: Honey, I'll ruin my shoes.

MR COLCHESTER: You can never go wrong with the Muppets.

ACE: The Doctor once showed the film to Charles Dickens. He died a very happy man.

VALARIE: I know what it's like to lose someone! The grief? Oh, that comes easy. The hard part is realising you can't change the past!

VALARIE: Tell me why then. Why did they have to die?

DOCTOR: So they and countless others wouldn’t die in agony later. So that the universe could heal.

VALARIE: Hmmm. If you were a monster, I’d leave. No, that’s a lie - er - I’d try and stop you. But you don’t sound like a monster.

DOCTOR: Thanks very much

VALARIE: Having to make a call like that. To save a universe that sick. Sounds like you’re a doctor.

DOCTOR: Oh yes, I'm the Doctor. I'm all bon mots and bonbons, but right now I'm furious! You took away so many people, the unwanted, the unloved, you promised you'd make their lives better- liar! Instead, you threw them into your machines, how cruel of you. And worst of all, you took away Professor Bernice Summerfield. I would say, "If you've harmed her, I'll make you pay" but you have harmed her! So there's that, I've got here too late. And whatever you're going through, if it doesn't kill you, I will hurt you until I feel better and I don't think I ever will! How cruel of me...

ELEVENTH DOCTOR: Know and time-travelling murderers with a passion for the convoluted?

TWELFTH DOCTOR: About two off the top of my head. But I’ve locked one in my basement and we’ve married the other.

(Wilf is packing up for the night when he sees the TARDIS flying nearby.)

WILF: There! Donna, it's, it's the flying blue box!

(He looks through his telescope and sees Donna waving from the TARDIS door.)

WILF: What? That's Donna. Yeah, that's Donna.

(The Doctor waves, too.)

WILF: And that's him. That's him. Hey, that's him! Ha, ha, ha! Go on, gal! Go on, get up there! Hey!

DOCTOR: Well! Tell me about your world, Klein. I mean, tell me about 1965.

KLEIN: You must have seen it for yourself.

DOCTOR: I’ve seen people learning how to be free, learning new experiences, new forms of self-expression, banding together to combat inequality and injustice! I can’t imagine that your world is very similar.

KLEIN: Are you trying to imply that my time shouldn’t come to exist? That Germany should never have won this war? You are wrong.

DOCTOR: Am I?

KLEIN: You want to change history!

DOCTOR: Not change it! Put it back on the right track!

KLEIN: According to whom?

DOCTOR: According to what I’ve seen.

KLEIN: And what about the world I’ve seen? The world of the future, Doctor. An efficient, peaceful, prosperous world. A golden age.

DOCTOR: BUILT ON HOW MANY CORPSES? Oh, I’m sure your trains run on time, Klein. But was it worth the bloodshed? Was it worth the slaughter of millions?

KLEIN: Yes.

DOCTOR: NO! It’s never worth it, Klein. There is no excuse for genocide!

CROWD: [Shouting] All hail Frobisher! All hail the big talking bird!

BERNICE: What's the best Isley Brothers song?

DOCTOR: "This Old Heart of Mine".

BERNICE: Correct.

DOCTOR: Surprising question.

BERNICE: Ah, well, surprise is my middle name. Bernice Surprise Summerfield. My poor Mum wanted to hammer that point home, I think.

BERNICE: So, do you have a girlfriend?

DOCTOR: No.

BERNICE: Boyfriend?

DOCTOR: No

BERNICE: Model Railway Set?

DOCTOR: Somewhere. The TARDIS is full of surprises.

BERNICE: But you’re not the sort of person that keeps a big table, with tiny trees and signal boxes and things?

DOCTOR: No.

BERNICE: Ah, then you must be interested in law and order.

DOCTOR: No. I like chaos. Big explosions. Rebellions. That sort of thing. Why do you ask?

BERNICE: Because I want to know why you go around in a police box!

DOCTOR: You know what one is?

BERNICE: It’s from my favourite era.

DOCTOR: I could’ve changed it ages ago. But I like the shape. And the motto. Call here for help. That’s what I do. I let the little children sleep safely at night, because I’ve searched through all the shadows and chased the baddies away. I’m what monsters have nightmares about! But everybody’s a monster sometimes. We all do things we regret. And sometimes we have to lose things very precious to us.

Their main impediment was one that only a flesh and blood man would have recognized: they had no heart, no emotions, no feelings. They lived by the inexorable laws of pure logic. Love, hate, anger, even fear, we're eliminated from their lives when the last flesh was replaced by plastic.

DOCTOR: (mexican) Why, hello, Bruce. What are you doing here, huh?