Thank you WIND, you surprised me pleasantly by releasing this episode today.
Spoiler:
I guess the alien parasites theory is pretty much dead now. At least I hope so.
Why the heck does Takano have so many scrapbooks? And why do the Sonozakis have most of them? If they knew what she was up to, shouldn't they have gotten rid of her years ago - after all, they seem to be very much involved in the murders both in the notes given to Shion and to Rena. It's very much likely that this was the case with some of the scrapbooks shown to the police. Anyway, it's going to be a crazy revelation if it turns out that the scrapbooks were right on money, just referring to different "realities", although that's a really unlikely theory ("underground earth people did it", LOL).
The Onikakushi flashbacks were quite moving. Ooishi's willingness to reveal disturbing facts about the characters past struck me again - how did he find this info about K1 and why did he feel obliged to tell that to the not so mentally stable Rena? It's as if he wants to increase people's sense of paranoia.
The last tip in the tips thread is again so full of possible interpretation that I think i will need to think long hard before trying my luck to interpret it.