Watch: The Power of Three

Tonight, the fourth episode of Series 7 of Doctor Who will air. Here is the synopsis from the BBC Press Office:

The Doctor and the Ponds puzzle an unlikely invasion of Earth, as millions of sinister black cubes arrive overnight, almost like presents falling from the sky. But what are they, what’s inside them and most importantly, who sent them? With the international community at a loss, it’s left to the Doctor to unearth who is behind the mystery.

I’m really excited for this one. There hasn’t been much hype surrounding it initially and it was actually the episode we knew the least about, but I’m looking forward to seeing UNIT again. What do you think? Tell us in the comments!