- Doctor Who: [taking a blood sample] You're not frightened of blood, are you, you mighty huntress?
- Leela: [unphased] Just hurry up.
- Leela: Doctor, why don't we just blow up Titan, Nucleus, breeding tanks, everything?
- Doctor Who: That's your answer to everything, isn't it? Knock it on the head.
- Leela: Effective, isn't it? Smash it once and for all? Well?
- Doctor Who: This is a hospital, not an arsenal."
- Doctor Who: The virus has a perfect right to exist as a virus, not as a giant storm threatening the entire solar system. Everything has its place, otherwise the delicate balance of the whole cosmos is destroyed.
- Leela: I still say we should blow it up.
- Leela: K-9's breaking up. My baster's finished. What're we gonna do?
- Doctor Who: Should we try using our intelligence?
- Leela: Well, if you think that's a good idea...
- Doctor Who: Come on!
- Supervisor Lowe: You're futile attempt has failed, as we knew it would. Now you will join the Nucleus.
- Doctor Who: Well, I'd rather not, actually.
- Supervisor Lowe: You have no choice.
- Doctor Who: [peering into the breeding tanks] Oh, look, look, they appear to be hatching.
- [smiling and offering his hand to shake]
- Doctor Who: Are congratulations in order?"
- Leela: Did you kill it?
- Doctor Who: No. I lost the antibodies.
- Leela: What? Never mind, Doctor. I found the answer.
- Doctor Who: You have?
- Leela: Knife them in the neck.