That was a terrible line: they’re really not! Plus the fact that he couldn’t get into it at any point in The Pandorica Opens. But w/evs, didn’t spoil it too much.

Firstly, that she was a time-traveller BEFORE she met the Doctor – and so, like Amy remembering the clerics & Angels, her memories didn’t wipe.

And secondly, that she got things a bit wrong, or at least vague, in her exposition to Amy – her “all memory will be purged” was already closer to the mark than the immediately-following “he will never have been born” (which would have lead to what happened in Turn Left on a universal scale. All series, the Cracks were played more as mindwipes than actual retroactive deletes, only reinforced by the deleted clerics showing up in the F&S reprise and Rory’s photo hanging around), and “where we should be” turned out to be in practice “somewhere on Earth on Tardisplosion Day” (remembering that the last place River stood in the “real” universe outside the Tardis was on Amy’s lawn in the early hours of 26/06/2010…)

> the “old versus new” dichotomy of the TARDIS has never really been commented on before in quite the same way as “big versus small”

Though a lot of people do ask what a police box is, or at least comment on it being an odd choice (before they hear the ‘got stuck’ explanation). Not sure this is what Moffat MEANT – in fact it seems it wasn’t the intention at all – but ‘futuristic spaceship contained within long-redundant Earth object’ is certainly old and new.

> it doesn’t answer the question of why it’s able to open it so easily

The line about prisons being easy to break INTO made this work for me. I don’t think the Doctor ever tried to open the Pandorica himself in episode 11, but that line suggested to me that he could have…if it weren’t already being opened from the inside, which had more troubling (albeit cleverly misleading) implications.

> Or why River shows up in the year 2010 for Amy’s wedding.

…with enough memory OF the Doctor to kick-off Amy’s recall. This is the hole that bothers me most right now. I do wonder if it’ll get fixed, but I sorta doubt it. (That the plot didn’t need it to work – that Amy could have got there on her own – is why it doesn’t especially matter.)