The Christmas special? Yes, it aired. In December.
Yeah, the end of my season premiere recording has the beginning of the Christmas special.I'm pretty sure it was replayed before the premiere also.
If you have access to Comcast On Demand, they've added some Doctor Who episodes including...
Doctor Who Rewind (45 min) Recently Added
Available until 12/9
Doctor Who 6.01 (45 min) Recently AddedGet ready for season six of Doctor Who with a special look back at all the best places people and moments from season five
Watch it On Demand:
Top Picks > Popular UK Series > Doctor Who
Available until 12/9
...It looks like you can get a copy from amazon or itunes: http://doctorwho.bbcamerica.com/seasons/5/episodes/special-1
Sadly, I don't have high speed, so getting it online isn't an option. Cable? As mentioned, my access to BBCA offerings jump from the end of the 2010 season to the opener of the current season.It's available from Amazon if you want to see it, but yes it has aired. It might still be on your cable companies On Demand as well.