Tobias Santelmann (Lars) & Martin Furulund (Sixers prospect) also worked together in Refroidis (2014) as Finn Heimdahl & Sverre J. Evensen respectively.
Anneke von der Lippe (Helen Sikkeland) & Frank Kjosås (Raymond) also worked together on En eaux troubles (2008) as Sissel & Tommy respectively.
The name of the character "Hamit Milonkovic" portrayed by Mahmut Suvakci should have pointed to a Balkan connection of the criminal underground, with Milonkovic probably originating from Bosnia-Herzegovina. However, he was described as having Turkish origin. This could have been a screenwriters' attempt to paint more complex criminal ties with the Balkans, while using both Turkish and Bosnian style of names and not any one specific. This is also visible with the outlined police chief Ronny Berg Larsen's experience from Kosovo, sometimes considered a hub for drugs comming from Asia and the Americas.
In the third episode, when Svend stops Philip from going to Henning, Svend said it was midnight. In the next scene, Svend joins Helen outside the house as sky appears to be in twilight just after sunset. Since the story is situated in southern Norway, the events must have occured around the summer solstice, when the Sun sets very late just below horizon to create the "white nights".