George Mann. Doctor Who: The Lost Paradox (№ 431894)

People perceive the world so linear, you live, grow old, die. But the universe is much more extensive than you might imagine. History is not linear simply because it seems to you to be. She is alive and changing with numerous ebb and flow. History is more than a body of facts and is far more fragile than it seems. Of course there are fixed points, yes. He paused for a moment to catch his breath - things that should happen, and that should happen and always happens. It is those events that cannot change themselves and cannot be changed. Everything else ... the story is flexible, Rory.