As good as the acting was, I struggled to take up the plot of series 4. No one was particularly likeable, which isn't a bad thing and probably quite understandable during the continuous night. The solving of the crimes goes nowhere for the first 5 episodes and it's mixed into the spiritual soup to confuse. The final episode crossed the threshold. Nothing was believable. The killing of Hank and the disposal of his body were dealt with in brutal sustain for any emotional attachment, the obligatory falling through the ice (3 times) and miraculous saving from the winter oxen at night were too much.