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.

Ya know, cold and driven

Forgot his name already ... tall, thin and ambitious, does not have trouble attracting women

Theis and Pernille, grieving

Rotten best friend

Rie ... whoa, beautiful and a great bod (rare combo)

Morten with his clown hair and expensive specs

Red herring number one, Syrian refugee

Evil old bastard Mayor

Long-suffering Swedish boyfriend

Buchard ... was he corrupt? another unclear story line

Lund's troubled teenage son, you see the earring? troubled.

Pernille's beautiful sister, works in a titty bar and snorts coke, good with kids

Olav, why did what's his name Holck have to kill him? Made no sense

Blix ... another skull-faced tall guy

Amir out of nowhere c'mon it ain't making sense

Prosecutor with nicely trimmed beard

Face of serial killer / puppy gifter