fussy. The Kid with a Bike is meant to be very good, but the trailer alone made me sad so I didn't record for same reason as you! 
I think the twins did switch. Very clever twist. I thought 'Lena's' reaction to 'Camille' in her bedroom was very realistic emotionally. Made me cry.
I'm intrigued by the little boy. Why has he latched on to the doctor? The other 'returned' have tried to find loved ones who know them. He caused the coach crash too.
Did Simon's gravestone say 1979-2002? His poor ex looked like she was trying on her wedding dress.
That poor girl that got stabbed was Lucy wasn't it, the one seeing the twins' father?
So the water level in the reservoir is going down too. Don't know how that is relevant yet, but it's clear it is connected somehow.