The episode’s title is a multi-layered descriptor of its various storylines:
Ultimately, "Madness" is an essay on the enduring nature of evil. It suggests that while a physical threat like Brady Hartsfield can be neutralized, the psychological wake he leaves behind is a storm that few can survive unscathed. Mr. Mercedes – Season 3, Episode 2: “Madness” Mr_Mercedes_s03e02
Critically, "Madness" marks a transition for the series. While the first season was a grounded "cat-and-mouse" thriller, this episode leans into the surreal elements established in season two. The "Dead Herring" discovery by Bill Hodges and Antonio Montez suggests a complex conspiracy that transcends simple murder, framing the Rothstein case as a "calling" that will test Bill's own sanity and sense of duty. Critical Reception The episode’s title is a multi-layered descriptor of