First of all, don't expect the normal number of Doctor Who episodes this year. Stephan Moffat just did an interview with the Radio Times. It's got some stuff on the new Christmas special, including some stills, like this one.
Am I the only one that looks at this picture and wants to scream, "YOU'LL SHOOT YOUR EYE OUT, KID!"?
Anyway, Moffat explains that there will only be six or seven episodes this year, not the full thirteen we've gotten since the revival (and a far cry from the 26 during the show's heyday). Keep in mind, that's about normal for a season of a British TV show. However, the extra episodes that would have made it a full thirteen maaaaaaaaybe being rolled into the following season. Let's see -- Matt Smith is confirmed for this season (although there were rumors that last season was going to be his last), but he wants to make the jump to Hollywood. 2013 is going to be the 50th anniversary of the show. Maybe a regeneration to go into the next run? Could this be a ploy for something big? Last year saw a number of "budget" episodes (episodes relatively cheap to make), and where did the money go? To the special effects needed to make the alternate reality of The Wedding Of River Song happen (God, I wouldn't like to have paid THAT special effects bill). And Moffat is too much a fan of the show not to go for something really big for the golden anniversary.
But don't take my word for it. Take it away, Mr. Moffat --
"For me, as a kid, when the afternoon got darker and there was a thrill of cold in the air, I knew that even though summer was over, the TARDIS was coming back! So yes, that’s part of the plan, that’s part of the reason for this little delay. But it’s not the whole story…
"Very soon now, Doctor Who is going to enter production for the longest sustained period we’ve ever attempted, and the biggest and best and maddest time ever to be a fan of this wonderful old show is rumbling towards us… We needed a little more time to prepare for everything we’ve got planned. That, above all, is why we needed this little gap. Just be a tiny bit patient, and trust me, we’ll make it up to you. For full and comprehensive details of the spectacle to come, consult your fondest memories in a couple of years time."
I'm glad I just enjoy the show. I can only imagine this is going to drive true Whovians up the wall.