It's been a while since I've been really impressed by Doctor Who episodes. The latter half of this series especially has elicited a 'meh' reaction from me and I don't feel an overwhelming compulsion to watch them again just yet (and I'm not touching "Night Terrors" with a barge pole). Yes, this episode did a surprisingly good job of tying up the loose ends (considering Moffat had 45 minutes in which to do it, and he had to introduce a new world as well - this explains why the first 15 minutes are dedicated to exposition) and yes, there were some cracking moments in there. However, it just wasn't as good as I was hoping it would be. I think I'll have to wait until I see all the episodes in close proximity before I consider this to be a good season overall.