Martha: You should be used to tight spots by now. Where are we?
The Doctor: The end of the line.
Martha: You took me—?
The Doctor: No place like home.

The Doctor: So, here you are. As promised.
Martha: So this is it?

Profesor Richard Lazarus (Mark Gatiss): With the push of a single button, I will change what it means to be human.

The Doctor: One trip, you said.
Martha: I suppose things just kind of escalated.
The Doctor: Seems to happen to me a lot.
Martha: Thank you. For everything.
The Doctor: It was my pleasure. leaves and then... No, I'm sorry. Did he say he was going to change what it means to be human?

Professor Lazarus: That's an interesting perfume. What's it called?
Leticia: Soap.

The Doctor: I hate this suit. Something bad always seems to happen when I wear it.
Martha: It's not the outfit, it's just you.

Oo. He's out of his depth.
The Doctor: Now. Well this building looks like his laboratory. Now we do tests.
Martha: Lucky I've just collected a DNA sample, isn't it?
The Doctor: Oh Martha. You're a star.

The Doctor: And that's two impossible things we've seen so far tonight. Don't you love it when that happens?

Did that process make you even more cruel?
Lazarus: No, my love. That I learned from you. You have a gift for it.
Then you know that I'll protect my involvement in the project.

Mr. Saxon: Do you know that man?
Mrs. Jones: No. He's a friend of my daughter's.
Mr. Saxon: Perhaps she should choose her friends more carefully.

Lazarus: Between the idea and reality. Between the motion and the act—
The Doctor: Falls the shadow.
Lazarus: So the mysterious Doctor knows his Eliot. I'm impressed.

Leticia: You have to spoil everything, don't you....
Martha: Tish, he's a monster.
Leticia: I know the age thing's pretty freaky, but it works for Catherine Zeta-Jones.

The Doctor: Listen to me, you people are in serious danger. You need to get out of here now.
Woman: Don't be ridiculous, The biggest danger here is choking on an olive.

Martha: What's the point? You can't control it. The mutation... You're a fool. A vain old man trying to defy nature. Only nature had her own idea, didn't she. You're a joke, Lazarus! A footnote in the history of failure.

Whats the Doctor doing?
Martha: He's trying to buy us time. Let's not waste it.

Lazarus: Why don't you come out and face me?
The Doctor: Have you looked in the mirror lately?

The Doctor: Until Lazarus reopened it...
Martha: It's like Pandora's box?
The Doctor: Exactly. Nice shoes by the way.

Doctor, what's happening? Sounds like Lazarus turned on the device.
The Doctor: I know. I was hoping it'd take him a little longer to work that one out.

Martha: I thought we were going to go through the blender there.
The Doctor: Really shouldn't take that long to reverse the polarirty. I must be out of practice.

Martha: He looks human again. Almost pitiful.
The Doctor: Eliot saw that too. "This is the way the world ends. Not with a bang but a wimper."

The Doctor: Ah Mrs. Jones. We still haven't finished our chat.
Mrs. Jones: Keep away from my daughter!
Martha: Mum what are you doing?
The Doctor: Always the mothers, all the time.

The Doctor: The Blitz.
Lazarus: You read about it?
The Doctor: I was there.
Lazarus: You're too young.
The Doctor: So're you.

The Doctor: Facing death is part of being human. You can't change that.
Lazarus: No, Doctor! Avoiding death. That's being human. It’s our strongest impulse. To cling to life with every fiber of our being.

Lazarus: I'm more now than just an ordinary human.
The Doctor: There's no such thing as an ordinary human.

Lazarus: You so sentimental Doctor. Maybe you are older than you look.
The Doctor: I'm old enough to know that a longer life isn't always a better one. In the end you just get tired. Tired of the struggle. Tired of losing everyone that matters to you. Tired of watching everything turn to dust.

The Doctor: Let's turn this up to eleven.

The Doctor: If you hang around Beethoven you're bound to pick a few things up.
Martha: Especially about playing loud.
The Doctor: Sorry?

...And whatever other time period you find yourself in.

The Doctor: So whatdy'a say? One more trip?
Martha: No. Sorry.
The Doctor: What do you mean? I thought you liked it.
Martha: It can't just be one more trip.

Martha: I can't just be a passenger anymore.

Martha: What is it?
The Doctor: Well I said okay.
Martha: Sorry?
The Doctor: Okay.
Martha: Oh, thank you! Thank you!
The Doctor: Well you were never really just a passenger were you?