[The Doctor slowly lowers his hand. Maybe a bit much too fast. The Doctor gives that dreadful look.]

Yeah. Aziraphale, sort of, confided some things in me... Awhile back.

[Ten's face relaxes a bit.]

Honestly, it's the same problem, I've seen thought-out the universe. Daleks. Cybermen.

My own people. How thar stagnation destroyed thar society.

[Then a twinkle in those brown eyes.]

That's why humans are so brilliant. They really are. How they keep being inventive.