Look, I remembered I still had to write this post!! Yay :D
Anyway... I adored this year's Christmas special, I have to say. It was all timey-wimey and awesome, and although there were some things about it (well mainly one thing) that I didn't like, these/this is minor and overall, I still adored the episode :p
Apparently it was hard to follow without watching it the whole way through; my sister missed the start and my mother missed chunks out of the middle, and neither of them had any idea what was happening in the episode as a result. But I watched the whole thing, so I remember.
Lastly... HOW FUCKING AWESOME WAS THAT TRAILER. The fez!!!!!