Lots of spectacle - I loved all the external shots of the Starship Titanic (RIP DNA, you are so very missed), and there were plenty of corridors to run down, as well as a ballroom full of glittering aliens and scary automata. Lots of humour, with Mr Copper's inaccurate diatribes on Earthly festive traditions and a London emptied in anticipation of Yuletide alien activity. A great bunch of one-shot cast members; I'm always a sucker for comic-character-unexpectedly-makes-noble-s
Bit heavy on the self-sacrifice, actually. The Doctor hardly managed to save anybody. Except the entire population of Earth, I suppose.
Forget any alleged sex appeal attached to David Tennant - my mum and I simultaneously Ooohed as Lovely Lovely Geoffrey Palmer appeared.
As a bonus, brave Midshipman Alonzo Frayn looked awfully like shep_shepherd.