DOCTOR: So, you've had a busy day, Vicki? Hmm?

VICKI: Yes, it was. Oh, something else I forgot to tell you. I think I've poisoned Nero.

DOCTOR: Really. What?

VICKI: Well, I didn't actually do it, but his wife was going to murder some poor slave or other and I didn't see why that should happen, so I thought

DOCTOR: For heavens sake, child, keep quiet. What did you do?

VICKI: Well, I swapped the drinks round.

DOCTOR: And I told you not to interfere with history. Come along, quickly, quickly child!