I watched 20 one hour episodes of this only to be furious at the end. Spoilers: It doesn't make any sense. Was he a serial killer or not? Why would he kill Nanna? He had no motive, it made no sense. Was it an impulse killing? Then what about Mette twenty years earlier? What secret did he and Theis share? It was just maddening.
I like listening to the Danish language and looking at all these beautiful Scandinavian people with their great names (Theis, Vagn, Pernille, etc.). But it doesn't make up for a terrible, illogical story. What a disappointment. And twenty episodes! Count 'em, twenty hours I spent on this.