I started this series from France. Each country has its own characteristics which you definitely can see if you pay attention to it.
Since it is about criminal investigations so I did not expect the tension between the detectives and the criminals. My focus, on the other hand, is
how the detectives crack open a window and get the criminals to take their own stories. If you expect to see water tortures or techniques that have been repeatedly use over and over in action movies, then please turn to other titles. This series is not ideal for you.
The first episode of Germany version is not attractive AT ALL. I have to be honest with you. In comparison to other three first episodes, the Germany 1st episode did not catch my eyes.
Keep in mind that not only the investigation is the main focus in the first episode, but the relationship inside the team is introduced.
However, the consequence of the 2nd episode freshens up my perspective on this series. The twist in the 3rd episode really goes into my heart. The acting is really so good that I almost can feel the hatred, loss, and desire from the criminal's eyes.
In contrast, the ending of the 3rd episode of France version and UK version looks more like an opening of the storyline of the investigation team. Not really focus/closure on the investigation.
Good acting, good storyline (not sure if any of them is true), very worthy watching.