The Christmas specials are usually fun and light-hearted, primarily to distract from the depressing series finales.
This time, as you can tell by the title, it’s not fun. There’s very little in the way of laughter for the audience in this episode and that’s because, there’s a regeneration at the end of it.
Yes, we’re saying goodbye to Matt Smith and hello to Peter Capaldi in this Christmas adventure, and he’s not going down without a fight. There’s a lot of gunfire, a lot of old enemies and a very much hopeless feeling to the entire thing. I’m fairly confident when I say there hasn’t been a sadder Christmas since series 4’s ‘The End of Time’ (and yes I know that was technically New Year’s)
But it does tie up some loose ends left over from Matt’s tenure. Which means Peter starts with a fairly clean slate, or at least, with only one big problem now. Finding Gallifrey.