I recently rewatched this episode as I wanted to see if it was as good as I remembered it. The short answer is: it wasn't. The performances were just as good as I remember, Capaldi can literally do no wrong but there was just something about the story that wasn't as good as I remembered it, I can't quite put my finger on what that was. Perhaps it was that we saw the monster a tad too early than what I would've like, perhaps it was some of the gravitas that had been lost as this was a rewatch with slightly older eyes. Whatever it was though, it doesn't detract from my enjoyment of the story it just means that sadly I cannot give this any higher than a 7 because there was just something that wasn't as good as I remember about this story.

Overall, this is a solid story with a fantastic performance from Capaldi which would probably have to go down as the finest in all of his tenure