The episode, titled (or "La règle de l'énigme - Partie 1" in French), aired on December 16, 2022 . Episode Overview
Early suspicion falls on Thomas Morrow , the eldest son, who is facing severe financial trouble and potentially stands to benefit from the hotel's assets. Source Material
In this installment, Chief Inspector anniversary celebration at the exclusive Manoir Belleforet hotel is abruptly interrupted by the discovery of a body.