"The Power of Three" is one of my favorite episodes from childhood (I watched this on a loop for a bit when I was younger) that is just as good as I remember. If it wasn't for the flimsy villain at the end, it would legitimately be one of my favorite episodes of all time. I adore 11, Amy, and Rory being all domestic. Due to the nostalgia of rewatching this and knowing what comes in the next episode, this rewatch is making me more sad than any DW episode I've rewatched within the past year. I miss the days when there would be three-season gaps between UNIT episodes, and they were used well and focused on science and not working in what is functionally Avengers Tower (or whatever it's called, I rarely watch Marvel movies). I think that "The Power of Three" definitely needs to come right before "The Angels Take Manhattan," but it was definitely a missed opportunity to have it be the third episode of the season (I think "A Town Called Mercy" wasn't very good, and I would be perfectly happy if this episode took its place). I wish this episode was more popular in the cultural consciousness (or Doctor Who in general, since I'm from the US), because placing a bunch of small black cubes around the school building would be an excellent senior prank, but I'm sadly one of three people at my school who would get the joke.