Yes, the scar's regressing into the original wound which caused it.
The Fred/Camille thing we just have to roll with... at that age 7ish years is almost half his lifetime, and the cousin thing kind of works.
The 'doctor'/Jesus freak is definitely creepy, but it might just be an evangelical thing; he's getting his rocks off seeing their local equivalent of the Rapture unfolding.
As for the dam, who knows... another tease thread which could prove disappointing in the end.
The woman in the cafe thing is clear now, but I still think the only 'rational' conclusion to all this is that they're all trapped in Purgatory until they find a way out.
And yes, everyone does seem a bit too calm, apart from Lena and Victor's adopted mother (or should that be daughter the way things are playing out?), who both seem likely to flip at any moment.
I was glad to see the back of the nosy neighbour, but that was a bit too heavily telegraphed for my liking. They did spice it up with the possibility the murderer's involved, rather than Victor. Or maybe it's both, or... lots of entertaining possibilities there.
And finally -- I think! -- the head in the bin thing must be connected with the returned brother coming into town to visit the bar. No idea why he'd stop off to drop that wolf's/dog's head in their bin, or why he'd be connected to Camille's house, but...