I found this show on PBS's app but I am so disappointed by it. None of the characters on any of the episodes are connected to one another. There are different actors on each episode. None of the plots from any episode have any baring on the former or the latter stories. The result is a very confusing mess of poor writing, bad acting, and silly, run-of-the-mill police procedure (one cop chases the bad guy and solves everything!). It's a generic drama set in a non-descript French town that isn't Paris.

Basically, the show is a collection of 90 minute movies that all fall under the guise of a "disturbing disappearance". If the writers had stuck with one cast solving one mystery per episode then the TV show probably would have been easier to follow. Only the first episode is worth watching and the rest get gradually worse and more unrealistic.