The perfect topic for Stéphane Bourgoin, the great French profiler and serial killer specialist. A topic already seen thrillions of times before. I am not mad about this kind of stories, but why not? A TV show like this obviously proposes serial killer topics. They can't avoid this. And Yves Rénier is so good, so excellent, especially written by the likes of him and Olivier Marchal, that remains an excellent time waster.