La Faille (English: The Flaw) or The Wall (French: Le Mur) is a French Canadian television crime drama series of three seasons, with a total of 25 episodes, which started broadcasting on Club Illico in 2019. The series is written by Frédéric Ouellet, directed by Patrice Sauvé (first two seasons) and Daniel Roby (third season), and produced by Dominique Veillet for Pixcom/Quebecor Content. The first season of eight episodes was broadcast in Canada from December 12, 2019 and in France as The Wall: Cover Your Tracks from April 26, 2020 via 13ème Rue. The second season, La Faille 2 or The Wall: The Chateau Murder (French: Le meurtre du château), of nine episodes was broadcast from October 17, 2021. La Faille 3: La Verger or The Wall: The Orchard, the third and final season of eight episodes, was aired on November 16, 2022.

The first season is set in the mining town of Fermont, north-eastern Quebec, Canada. Fermont's major structural feature is popularly known as the Wall, which comprises self-contained residential, commercial, recreational and educational buildings. In La Faille the main protagonist, detective sergeant Céline (Isabel Richer), is sent from provincial capital Quebec City to investigate the murder of a stripper-prostitute, inside the Wall. Assisting Céline is local uniformed policeman Alex (Alexandre Landry). Céline encounters her estranged daughter Sophie (Maripier Morin) who is married to the mine-owner's son Lou (Jean-Philippe Perras). In France season one's broadcasting was halted in mid-July 2020 when French-Canadian singer-songwriter Safia Nolin aired allegations of sexual assault and racist statements by Morin. Morin publicly apologized, Nolin did not lodge any official complaint and the artistic community pressured Club Illico so that broadcasting was resumed.

During the second season, Céline is back in Quebec City and investigates the murder of a civil engineer – found encased in concrete in a Château Frontenac bathroom. Alex, on compulsory leave for post-traumatic stress disorder, unofficially investigates the case, going undercover at the château. Sophie joins her father William (Bruno Verdoni) to hunt industrial secrets related to the city's major engineering projects. Céline is partnered with rookie detective Daphne (Naila Louidort).

Before filming of the third season began, Morin was removed from the cast, after further allegations of inappropriate behavior had been raised. For the third season, Céline traveled to her fictitious hometown of Applegrove in Eastern Townships (or Estrie). Alex responds to a skeleton found in her uncle's orchard, which is identified as Céline's long-missing grandmother. Céline and Alex are joined by Estrie police officer, Johnny (Didier Lucien). The squad becomes enmeshed in feuds between local families. Complications increase when the squad finds links to the bordering abbey of Saint-Benoît-du-Lac and reinvestigate the historical murder of Céline's cousin.