Things we learnt tonight (spoilers):
There is good Seth and bad Seth - is this significant?
Linus' dad likes blondes and was having a thing with Hattie. His wife was also blonde and is mysteriously dead and continues to appear at the edge of the woods.
Malcolm is dead and prior to being dead was peeping tom and crap at business. Again I think this is all red herring
Seth described Hattie as an earth spirit
Caitlin is being showered with stones
Charlotte could hear the woods whispering to her and then talked to her hamster
Charlotte's dad Alan is STILL behaving strangely
I don't think there's a straightforward explanation for any of this. I don't think Hattie is necessarily dead but I think the woods send you utterly loopy. Malcolm spent time there and is dead, Gail despairs every time she sets foot there, Seth is very odd, Charlotte can hear the trees talking to her. I think Seth's throwaway reference to druids may turn out to be interesting.
I don't get how Hattie could have rung Caitlin either. She was in her MAy Queen costume - where was her phone?