Howling:Sometimes knowing your own future is what enables you to change it

31:40 into The Girl Who Waited, Amy says, "I'm now changing that future… every law of time says that shouldn't be possible."

The Doctor answers, "Yes, except sometimes knowing your own future is what enables you to change it, especially if you're bloody-minded, contradictory, and completely unpredictable."

Although Rory and the Doctor go on to conclude that if anyone can defeat predestiny it's Amy, this sounds like a pretty good clue for how the Doctor's going to escape his own death. Of course it later turns out that the two versions of Amy can't exist in the TARDIS at the same time, but then Moffat told us that "where is the future Doctor's TARDIS?" is "a good question" and "it's worth keeping your eyes open".

More importantly, at the end, while they couldn't save that future version of Amy, they did prevent her from ever existing, so a different 57-year-old Amy will be able to exist later. And that's really what the Doctor would be after—not saving his future self from the astronaut, but preventing himself from ending up in that future in the first place.

Up until now, I thought it was going to be like in the novel Anachrophobia, where the Doctor carefully arranges changes so no paradox is visible and his apparent death is the same as always except that he isn't actually dead. But now I'm not sure. Any theories on how he might use what he learned here to change his future? --173.228.85.35 23:43, September 10, 2011 (UTC)