NOBODY: Oh, the powers this place is granting me, Doctor. Just while we’ve been having our little chat, seventy-three people used the phrase “Nobody tells me what to do,” an anxious general said “No one has access to the silo room,” and a lorry driver, who’s a bad poet in his spare time, came up with the line, “Nobody stops the Earth spinning, or tells the sun when it can shine.” I’m going to have so much fun with this planet. Do you want a preview? [...] Hey, Doctor, have you heard? Nobody tells the sun when it can shine. And I say - Stop.

(The Doctor and the Brigadier have found a pilot of the jet that has been shot down. And whatever infected the pilot is now free)

Brigadier: Doctor, what are they?

The Doctor: Alien nanobots! As I suspected!