Lucius, The Doctor and others in “The Fires of Pompeii”

There is nowhere to run, Doctor, and daughter of London!

Now then, Lucius, my Lords Pyrovillian! Don't get yourselves in a lather! [pauses] In a "lava"? No? No... But if I might beg the wisdom of the gods before we perish? Once this new race of creatures is complete, then what?

My masters will follow the example of Rome itself! An almighty empire, bestriding the whole of civilisation!

But if you've crashed, and you've got all this technology, why don't you just go home?!

The Heaven of Pyrovillia is gone.

What do you mean "gone", where's it gone?

It was taken! Pyrovillia is lost. But there is heat enough in this world for a new species to rise.

Yeah, I should warn you, it's 70% water out there--

Water can boil! And everything will burn, Doctor!

Then the whole planet is at stake - thank you, that's all I needed to know.