Sorry, I'm not completely sure about this, but everyone (well, not everyone, but a couple of people) have mentioned Rory's hospital ID badge as having the date 1990 on it.

Some of you seem to think this means the story is set in 1990.

As I can't find footage of it, and I don't remember getting that good a look at the detail (clearly, I don't have the Doctor's gift for bullet time memories...) I wonder if someone can absolutely rule this out as a possibility:

It's Rory's date of birth?

I thought it was his date of birth aswell, but I think it says on it that it is the day he got it.

It's either a simple (but stupid) mistake, or a clue to something very weird going on there, as the technology on view in the episode (mobile phones that take pictures) clearly didn't exist in the 1990s.

Think Moffet said that it was a mistake that was made, however he could be bluffing.

I'm not sure it was a mistake.

I reckon something wibbley (and indeed wobbly) has happened with time. Hence Amy not remembering The Daleks.

The badge says:

Issued 30/11/1990

Maybe the camera only focused on the badge to show us his name and the date was a mistake. Or maybe it was something more.

I thought it was the date he became a nurse/was given the badge, but, come to think about it, he should roughly be around the same age as Amy, who is 18/19, and Rory is only young himself. I think it must be his date of birth. Though I do hope it's something a bit more exciting.

There really was no obvious reason to show the badge in such a close up apart from the Issue Date.

We already knew his name, we already knew he was a Nurse and we had already focused on him taking pictures of Prisoner Zero.

Hmm... but there's another interesting, if somewhat tangential, issue arising...

You can understand Amy not knowing of the Daleks if, indeed, TEH is set before The Stolen Earth in 2009, but...

As everyone else on the planet (except Donna) is well aware, and in some cases remember the fact 50 years later (a la Waters of Mars), how is it in 2012, Van Stratten and his people had no idea of the true identity of the Metaltron?

Metaltron.

Sorry, love the name, had to say it again...

Metaltron.

Because Time has changed.

If the Doctor NOW travelled to Utah to the day of his last visit he would find that Van Statten knew all about Daleks.

He may also find that the Dalek that Van Statten had owned had blown up a couple of years earlier (the same time the Earth was moved across the Universe).

Even though the Doctor (and Rose) probably remember their visit to Utah, in the current timeline it would either not have happened (no Dalek to send out distress call) or happened differently (Van Statten knows all about Daleks).

2012 was simply a mistake. They just didn't anticipate doing a big Dalek invasion in the second series. You can come up with all kinds of explanations to try to keep both as canon, but the simple truth is that if they'd known in 2005 what they were going to to in 2006 they'd have written "Dalek" differently so it was set earlier. Just like if they'd known Doctor Who would be the top scripted drama in Britain in 2010 they'd never have said the Doctor has only 12 regenerations. It's a TV show, written and produced by fallible humans under pressure of time and budget.

And the same is almost certainly true of Rory's badge. Someone made a mistake. And you know why that's almost certainly true? Because the explanation of why Rory's badge said 1990 when the episode clearly appeared to be set in 2008 would be long, convoluted and deadly dull. It would go right over the heads of the casual viewers who never noticed it in the first place. It would be bad television - the Doctor standing there explaining something that isn't fascinating or intriguing, just dull and pointless.

In an off-kilter world, perhaps words are subtly different.

Maybe Rory was issued (born) then.

Or he was issued, like a stamp...