looking for whenever
"That's never Damascus," Rose said, looking at the blur of images in the TARDIS viewscreen.
The Doctor shrugged. "It is, you know. It's Damascus whenever -- look, there's it being founded, and there's an invasion, and there's the bare ground before it, and there's the bare ground after it . . ."
"So which of them is the real Damascus?" Rose asked.
The Doctor leaned forward. "Damascus is four-dimensional, Rose. Three dimensions in space, and a fourth in time."
"But the only way you can see it like that is from the outside," Rose pointed out.
The Doctor sighed. "Yes."
---
