Which is valid, and has never entered into my critiques of the show, because I do think it's valid: Moffat writes things that are scary, or wondrous, or mysterious, because they feel scary, wondrous, mysterious to him, without investigating why those things are true. Which is fine, because it works in the same way that all good children's literature started as bedtime stories, and at the end of the day, it completely works out. But you get that sympathetic effect only if you're in this for the same reasons as Moffat, meaning that you're a fan of the show qua the show. He's a brilliant Group A Fan, and his love of this show is entrancing and written on every breath. But if you expect anything from your entertainment other than that, you're screwed, because there isn't anything more to it: Women are confounding creatures without an owner's manual or an off switch, robot heads eating your face are scary because that's scary, constantly talking about how bad-ass you are is bad-ass, and Rory's a hero because we say so.)
Amy notices the similarities between "Pandorica" and "Pandora's Box," finally, because they are so very obtuse, and explains to us about what that is, and also that it was her favorite book when she was a kid. This is stressing the Doctor out to the point where he's making up aphorisms, because now it's all sort of piling up that Amy is the universal USB we always knew she was, but he keeps going: The box will be easy to open, because it's a prison. Those are harder to open from the inside than the outside, for obvious reasons. In fact, it's already opening itself -- the puzzlebox that opens from the inside, they called it once -- and so now it's just a matter of hours. Deadlocks, time-stops, matter-lines, other things I don't know about. I can't believe we're fifteen minutes in and nobody has mentioned "perception filters."
Other questions: What could need all that? What could get past all that? What could inspire that level of fear? Has the Doctor met this Goblin? Why is it opening now? How could Vincent have known about it? Why are Stonehenge and Underhenge suddenly transmitting a warning to everyone, everywhere, to every time zone that the Pandorica is opening? (Oh good: Including "poor Vincent," who wasn't a Crazy Oracle after all. That's a relief.) And if all this is happening, why doesn't the Doctor know about this? It seems pretty major. And should they stop the signal before everybody starts showing up? (Wow, I just realized the Significant Date is no longer Significant, since there was never a wedding, since there was never a Rory. That's sad.) And what's going on in the sky?