The body of Cass breathes when Poul runs into the room where Uvanov and D84 are holding Leela.
The Doctor: Would you like a jelly baby?
Poul: Shut up!
The Doctor: A simple "no, thank you" would have sufficed…
Uvanov: You have cost me and the company a great deal of money, and you have killed three people. Can you think of any good reason why I should not have you executed on the spot?
Leela: No. But you can, otherwise you'd have done it!
Uvanov [ regarding D84 ]: That is a single-function labour robot. D-class. "D" for "dumb". It cannot speak.
Leela: Has anyone told him him that?
Uvanov: You have cost me and the Company a great deal of money and you have killed two people. Can you think of any good reason why I should not have you executed on the spot?
Leela: No, but you can, otherwise you'd have done it.
Uvanov Who are you?
The Doctor: I'm the Doctor, I assume you're in command here.
Uvanov Yes, what are you doing here?
The Doctor: Just standing here talking to you.
Uvanov I should be very careful if I were you.
The Doctor: No doubt you would.
Uvanov: I suppose it's also a coincidence that as soon as you two arrive, three of our people are killed. Well?
The Doctor: I'm sorry, I thought it was a rhetorical question. Yes, it's just a coincidence.
Poul: It's impossible. It's just impossible.
The Doctor: Bumblebees!
The Doctor: Terran insects. Aerodynamically impossible for them to fly. But they do it. I'm rather fond of bumblebees.
The Doctor: You know, you're a classic example of the inverse ratio between the size of the mouth and the size of the brain.
The Doctor: By the pricking of my thumbs, something wicked this way comes.
The Doctor quotes from Shakespeare's Macbeth, Act 4, Scene 1. The line ends with Open, locks, whoever knocks!.