The episode starts with the Doctor stepping into a fairy circle, causing him to vanish and locking the Tardis. I'm not a huge fan of this season's "magic is real" vibe, but so far it tracks.
A woman appears and follows Ruby around. She ends up in a pub where she asks about the fairy circle. After a long build up explaining just how serious the fairy circle is, it turns out no that's just racist. Pretty funny, and it works with the magic theme. So how does the fairy circle actually work then? No fucking clue, they never explain it. As far as I can tell it just exists for this bit.
So this woman makes everyone near her hate Ruby. Everyone. Why? Who fucking knows. They never explain why. It just does. It leads up to a politician getting scared and ruining his career. Again pretty clever. But again no explanation is ever given as to how or why this happens.
Then Ruby dies. And when she dies she becomes the scary woman. Then she goes back in time. How? Why? No idea. It just happens and you gotta deal with it.
So apparently the Doctor stepping on a fairy circle that doesn't do anything makes him vanish for no reason, creates an old copy of Ruby that follows her around for no reason, who scares everyone for no reason, then when Ruby dies undoes everything for no reason.
This. Makes. No. Sense.
I kind of expect we won't be left without an answer before the end of the season.
It wouldn't make sense to leave these important storylines without any answers.
Showrunner literally was just talking about how they were moving away from self contained episodes and want storylines to last longer.
It's not just the nosy neighbor, there's going to be a big bad revealed soon that's been responsible for all the "magic" and likely why ruby keeps making it snow, why she resembles Rose in so many ways, and why the doctor of all people hasn't put it together yet.
I'm betting on some kind of perception filter, some old school Bad Wolf nonsense, or Clara connection because I remember snow happening a lot during her pivotal story moments.
Like Rose and Clara both kinda got "lost" in time, past, present, and future.
It would make sense for them to still be causing some effects, or for someone using a perception filter to influence the doctor would include a perfect companion showing up who reminds the doctor of his closest companions. There's probably other ways Ruby is reminiscent of other companions that I just haven't noticed.