Series producer Marcus Wilson tweeted today:
So it's goodnight from me, and it's goodnight from him. That's a wrap. Christmas 2013. Thank you all.So, Matt Smith has officially finished his stint (filming, at least) as the Eleventh Doctor, and Peter Capaldi will be the Doctor when production resumes next January. Peter Capaldi filmed his first scenes on Thursday, when the fateful regeneration between the Eleventh and Twelfth Doctors was filmed...
— Marcus Wilson (@themarcuswilson) October 5, 2013
The 2013 Christmas Special will be broadcast on Christmas Day.