This week's Doctor Who offered the quietest, slowest alien invasion we've seen in the series in some time, but that seems fitting considering that the episode was really all about the trinity of Amy, Rory and the Doctor. Five questions about "The Power of Three"? Maybe that's two too many...

Can Someone Else Water The Plants?

Seriously, if I wasn't entirely convinced by his appearance in "Dinosaurs In Space" - And, to be honest, I pretty much was - "The Power of 3" won me over to Brian Williams entirely. Sorry, Oswin; I really would love it if this man somehow ended up as the new companion. "Brian's Log"? I mean, come on. He's a wonderful, wonderful character, with everything I liked about Wilf (And what is it about older patriarchal figures for companions that makes them so happy about the Doctor essentially kidnapping their kids into space, anyway?) and an added amount of humor and resourcefulness. To everyone who writes Who spin-offs: More of this character, please.

What Is So Bad About Humanity Colonizing Space?

On the one hand, I get that the alien pest control thing was essentially a MacGuffin - and a really nice one, at that; I liked that the human tendency towards novelty, quickly followed by an ability to assimilate everything so that it becomes, essentially, invisible, was the key to the plot - but I can't help but wonder who, exactly, decided that humanity had to be dealt with before they colonized space - and, why humanity in space would be such a bad thing. There are countless stories to be told here, and even though I doubt that it's anything that'll be followed up this season, I'd really like to see this plot thread followed up on at some point in the future.

Wait - The Ponds Have Been Traveling With The Doctor For A Decade?

Amy's line about it being ten years since she and Rory started traveling with the Doctor was one to conjure with. She immediately fudged that detail by saying that it wasn't ten years of "real" time, but Amy and Rory's personal timelines, but still - I can't help but feel as if this makes the Ponds the longest-running companions of the Doctor in the series' history (More established Whovians, who am I forgetting? K9, technically, could be more long-lasting, right…?). The conversation between the Doctor and Amy as they sat outside UNIT HQ really sold me on that idea, too; there's an emotional intimacy and affection between the Doctor and Amy (and Rory, albeit less so) that I actually believe, when I see them all together. I'll really miss them when they're gone (Next episode! Sob!), but this line about the ten years of timeline together - Even with the gaps for real life that we know have happened, which total at most a year at any one time; someone will end up making a timeline about this, I'm sure - means that there are all manner of "untold adventures" for comics, novels and whatever to tell for a long, long time.

(Also, maybe this is just me, but I feel as if Amy and Rory had more fun, silly adventures with the Doctor than at least any of the other companions since the reboot, for some reason. Just the glimpses of the mid-party jaunts tonight suggested that, for me.)

Is UNIT The New Torchwood?

It'd make sense if UNIT come back to the center of the show in some way. It's not as if we haven't seen them since the reboot (Didn't Martha and Micky end up working with them, in some capacity, in the dying days of the David Tennant era?), but they had a particular authority - and a particular pacifist, scientific authority at that - in this appearance that I find myself thinking that they're going to replace Torchwood as the scientific organization du jour in the Moffat run and moving forwards when needed. Which, let's be honest, is pretty fair considering Torchwood deposed UNIT in the first place.

The Ponds Are Going To Die, Aren't They?

Given that we dealt with the idea of the two just… giving up life with the Doctor this week, I have a very bad feeling about the fact that Amy and Rory are leaving the show with the next episode. All that talk about "some… not many" dying, and Brian asking the Doctor to bring them back alive… That's really not looking too good for them, is it? After this episode, that just seems especially cruel. I've always liked Amy and Rory, but after this week, I kind of love them. Doing that just in time to kill them next week…? That is just mean, everyone involved in the show these days. I can only hope that I'm really wrong… After all, it's not as if Steven Moffat normally likes to play into people's expectations, is it?