I couldn't bear watching this series except for the first four episodes. It is not only very boring but also -as it also happens with another police French series Tropiques criminels - tries to indoctrinate watchers with questionable points of view as if watchers were unable to think by themselves. It is unrealistical and ridiculous having a policeman going nuts because the person who he is questioning calls gays by a pejorative name or that the chief police gets so drunk she can not say if the man he has sleeped with forced her or not. On the good side there are no blood or nasty sequences. On the bad side it is terribly boring, all the characters are unsympathetic and uninteresting. There is more time in each episode dedicated to crew members' personal life rather than the case they are working on and if writers thought we are supposed to find this interesting were totally wrong. Chief police is a woman unable to control her own life and who - as usual- has a troublesome irritating teenager daughter who blames her mother all day long. (Why do most screenwriters describe teenagers as spoiled unbearable and egotistical is something to be considered - maybe they are frustrated parents with that kind of children?). Exactly the same as in Tropiques criminels. Maybe both series share the same screenwriters.
The new police on the block is disagreeable, he does not like to work with the crew and acts arrogantly. None of the characters makes you interested to know how they private lives run so why write about it? Maybe if the crew was more likeable or maybe if the cases were more interesting and would take more screen time it would be more interesting. But as it is is a totally time waster.