DOCTOR: The key! I've lost the key!

SARAH: I've got it.

DOCTOR: Sarah.

DOCTOR: Peri.

BOOK: Pathetic?

DOCTOR: You're sane. Enough of that I think... No no. Doctor.

BOOK: Verbose.

DOCTOR: You spent too much time talking with Peri.

ROMANA: K9 is a vicious robot criminal from the fifth galaxy. Aren't you K9?

K9: Affirmative!

ROMANA: Oh come on. You need to be more assertive than that.

K9: Slaves will carry K9 unit into the capsule!

LEELA: Why do you make that funny voice K9?

K9: Now slave! Or I will have you atomized!

LEELA: I will kick your head off first!

LEELA: Oh... It is a game!

K9: Mistress.

LEELA: That is alright then!

LEELA: Is this a TARDIS? But it is the same size on the inside!

TORVALD: I don't mind the squeeze if you don't, Savage.

LEELA: My name is Leela, Weasel Mouth.

LEELA: Romana, this TARDIS is broken.

ROMANA: It's meant to get you there and back. You are not traveling as Time Lords now.

RANI: There, the fissure's closed. Try the box.

CLYDE: What am I supposed to do?

RANI: I don't know. Hold it up.

CLYDE: Er, hocus pocus? Open sesame? Oh, I don't know. Oh, Jumanji!

SARAH JANE: I'm sorry. I didn't mean to interrupt, but I'm afraid this isn't a social call.

BRIGADIER: I would almost be disappointed if it were. How can I help you?

SARAH JANE: I need to break into the Black Archive.

BRIGADIER: Oh.

JOHNSON: Now do you believe she's a terrorist?

ANDY: She shot the wheels. What kind of terrorist shoots your wheels, hmm?

JOHNSON: A clever one.

K9: This unit may not be removed.

MR SMITH: Excuse me, Clyde.

CLYDE: Oh, please don't tell Sarah Jane. I'll have him back by lunchtime.

MR SMITH: I was going to thank you. A break from the dog is most appreciated.

CLYDE: Bit annoying, is he?

MR SMITH: I couldn't possibly comment.

CLYDE: I'll see myself out.

DARIUS: What do you mean stumble?

STARKEY: You fell through a wall!

DARIUS: Pushed. Pushed through a wall.

K9: Something is not quite right here.

JORJIE: You can say that again.

K9: Something is not quite right here.

K9: Emotions. As I said ruining a perfectly good cyborg!

K9: News of my regeneration has been greatly exaggerated.

LUKE: At school, Mister Chandra called me into his office, because he thinks I should take my A-levels in June.

SARAH JANE: But you've just started sixth form.

LUKE: I know, but, well, I'm clever, aren't I? It's why he thinks I could get into Oxford. He says I could go to university a year early. Mum?

SARAH JANE: And you think now's the time to be telling me this?

(They are handcuffed to a grill.)

RANI: What if he's not there at all? What if it's just the two of us left in the whole wide world?

CLYDE: Like Adam and Eve.

RANI: Yeah. No! There's got to be someone else. There's got to be.

LUKE: Remember, he's American.

SERF: Yee-haw! As I woke up, put my grits on the griddle, I thought, gee, what a cotton picking day to launch a new computer.

LUKE: What? What? You've been watching Toy Story again.

DOCTOR: There goes my plan A

SARAH JANE: Is there a plan B?

DOCTOR: Eh. Plan B would never work, we'll try plan C.

EMILY BARNFATHER: It simply says to go to his study.

EMILY BARNFATHER: His study?

FOLEY: That's where he vanished, Miss.

EMILY BARNFATHER: I see.

DOCTOR: How can you be sure?

FOLEY: I can only tell you what I experienced, Sir.

FOLEY: I left the Professor there, it's a windowless room and he closed the door behind me. When I returned he was gone.

CHARLEY: A regular locked room mystery.

EMILY BARNFATHER: A secret tunnel... We found an honest to goodness secret tunnel!

CHARLEY: And a very nice one too.

EMILY BARNFATHER: But who put it here?

DOCTOR: Well done you did it.

EMILY BARNFATHER: It also means at some point we will have to come back this way.

DOCTOR: We'll cross that plank when we come to it.

EMILY BARNFATHER: Who are you Doctor?

DOCTOR: I am me.