And there are people who go missing. Eh, maybe they got attacked by something they couldn't see/detect with their senses... But seriously, this sounds like the

And there are people who go missing. Eh, maybe they got attacked by something they couldn't see/detect with their senses... But seriously, this sounds like the kind of plot that'd work pretty well in a Doctor Who episode. And the logic I gave there was how they tried to justify the existence of stuff like the Weeping Angels and Vashta Nerada in story.