Just finished "The Christmas Invasion" and "New Earth," as part of my NuWhu rewatch, anticipating the anniversary. I was dreading getting to this point, as these two are among my absolute least favorite episodes. Still not really impressed by either of them, though "New Earth" didn't bug me too much this time around. On the other hand, I still find "The Christmas Invasion" to be one of the biggest letdowns in Doctor Who history. The writing is absolutely terrible. It's a very inauspicious start for the new Doctor, there's very little for Tennant to actually do, and the swashbuckling sword-fight set piece is perhaps the worst thing in the entire series. RTD amps up Rose's annoying factor in this one, and it keeps increasing as the series progresses. And the sudden about face for Harriet Jones is an utter corruption of an otherwise great character. "The Christmas Invasion" is just an absolute mess. No wonder it took me a few episodes to warm to Tennant. He's absolutely wasted here. "New Earth" isn't much better, either. The design of the cat-nuns is the best thing about the episode. It works as an okay follow-up to "The End of the World," but just "okay," nothing more. The gravitas and meaning of the former story is gone here, in favor of picking up on the least interesting aspect, Cassandra. Proving once again that when something he writes works, Davies usually doesn't understand why. Unlike "Christmas Invasion," Tennant does have a few moments in which he can do something, but it's still not great. It's just...bleh. At least, he gets much better next episode, and then the stories themselves start to get better in the episode following. If that hadn't happened, I probably would have written off the show by halfway through the season. These two episodes, though, perhaps the worst start to an era of Doctor Who. Period. Ugh.