The series differs from typical police procedurals by focusing on the daily work life and the private problems of the main characters instead of following a "case of the week" scheme, and because of the overarching storylines spanning one or several seasons.
Due to its uncommon dramaturgy and its ambiguous drawing of the main characters, it was critically lauded and received several accolades.
Filmmaker Edward Berger, who later made Oscar and BAFTA-winning film All Quiet on the Western Front, directed and co-wrote several episodes of Season 2.
[2][better source needed] In reality, Berlin, unlike other major cities such as Munich, Hamburg or Cologne,[3] has no such service.
It can be divided into three narrative levels; a plot spanning all three seasons is a corruption case within the Berlin police that the officers of the Berlin Crime Squad investigate, additionally, the show follows the private lives of the investigators, and the criminal cases they are confronted with every day.
However, the money belonged to the Russian drug dealer Han who now looks frantically for it which endangers Haroska's life and that of his family.
The investigation is reassigned from the KDD to the Landeskriminalamt and led by Rainer Sallek who, together with the Berlin Chief of Police, is in business with Aoun.
The third season is very focused on the character of Mehmet Kilic who has developed a cocaine addiction and works in a night club to support his drug habit.
The series differed from many German television series due to its rapid narrative pace, the complexity and thickness of the plot and the subject matters (which included forced marriage, euthanasia, rape, gambling addiction,[10] child sexual abuse and abuse of elderly in nursing homes).
[15] Series creator Orkun Ertener mused that the show was "...too complex, too fast, too dark, too immoral" for the German audience and voiced his fear that ambitious series such as KDD will never be successful in Germany: "...We will most likely never gain upon Great Britain and the US that are setting the standards".