Dr Who: The Pandorica Opens.

So, I'm a bit behind on this. Fortunately, as the this is the first part of the season finale I can fit a lot of other stuff in that crops up, including my half baked theories as to where this is going. I should say that, even with the slightly poor Silurian two parter, this has been the best season of Dr Who since it was relaunched. Hopefully the conclusion will be as good.

The episode opens with a sequence using all of the 'hero' characters from the series so far, with Vincent Van Gogh, River Song, Winston Churchill and Liz 10 cropping up to convey a message to the Doctor. It's nicely worked, and proves to be a great foil to the end of the episode. There's even a nod to the late, great Douglas Adams with the message on the cliff. E=If you've never read Hitchhikers Guide To The Galaxy, do so immediately.

The Doctor duly arrives in Roman Britain, to investigate the giant plot device that is the Pandorica, which is opening. Once again everything is far too convenient, and Amy seems to be the focus of everything. The plot spins various directions as Rory returns, having been eraed from existence during the Silurian story, and just about every alien race encountered so far showing up, ultimately to outmanovour the Doctor. The Romans (and Rory) turn out to be Autons, and everything goes wrong at the end, with the Tardis exploding (with River in it), Amy being killed and the Doctor being locked in the Pandorica. The gathering of the villains is a lovely counterpoint to the opening with the heroes. So where from here?

One notable point is that this version of River Song is from before the Weeping Angels storyline. That means she has to survive the Tardis exploding. In theory at least - time is being unravelled by the Tardis exploding. Also of note is Leadworth, and how wrong it seems to be. Amy is clearly the centre of the story, so she can't be dead either. There is also no obvious villain for the story. They're all accounted for in the final scene of the episode, aren't they?

Well, no. There are two notable absences. The first is the Master. He seems unlikely to be the villain this time around after being the 'big bad' in the last major storyline, and he's supposed to be trapped on a dying Gallifrey.So who does that leave?

The Dreamlord, the only major villain from this season to not appear in the final episode. We know he didn't vanish completely at the end of his episode, appearing in a reflection to the Doctor. As a part of the Doctor, there are two distinct possibilities for an evil Doctor. One is that he is a future regeneration, who made his first appearance in the Doctors subconscious, but will one day be regenerated into. While good, this could limit the future regenerations so is unlikely. This leaves the possibility that he is the Doctor from the past, blanked out by his own subconscious. We only ever saw one story with the Paul McGann Doctor, and never saw him regenerate. Who know what he got up to?

Further evidence fo this is the 'Tardis' from the previous episode, the interior of which looked a lot like that of the Paul McGann Doctor's. If there's another Tardis, where is its pilot? Could it be a past Doctor, attempting to create a new Tardis?

A good indication that it is the Dreamlord in some form or another is that the whole lifting a trap from Amy's mind fits his MO, as does creating a perfect village that is wrong in someway in Leadworth. Finally, there's Rory. He was erased from existence, so the alliance would have no way of creating such a perfect replica. The Dreamlord was in his mind, so he'd be able to do it.

Of course, it could also be the Dreamlord gaining a seperate sentience somehow. Mymoney is on him being the villain in some way for certain. As for how the Doctor gets out of this one, and what Amy's secret is, who knows? It'll be fun finding out.