I'd worked out whodunit by halfway through episode two but not why - that would come near the end of the final moments of the drama. But how could the cops be slower than me? In the face of continual lying and stories that didn't add up they seemed to be bending over backwards not to get the correct person convicted.
At the same time that all this was going on in Paris, another drama was playing out in Berlin. Neither the main plot in France nor the sub plots in Germany were particularly convincing; I'd have been more impressed if Lukas had turned out to be gay which looked for a while how things were going.
I'm not sure a French lawyer would have compromised his ethics as badly as Maître Duc. I can't imagine a British barrister doing what he did. That he wasn't up before the disciplinary committee for his known infractions was a wonder. As he himself said, lawyers aren't allowed to investigate themselves for obvious reasons. He was doing so openly.
The ending was equivocal. Did Hélène stop being the "perfect mother" and seek happiness instead or did she carry on with the sham? I don't think there'll be a second season so we shall never know.