originally aired from October 2016 to May 2017, consisting of 22 episodes. This season is marked by significant personal milestones for the crew of Firehouse 51, including the landmark 100th episode. Core Storylines and Themes
: The season begins with internal friction as Jimmy Borrelli blames Chief Boden for the death of his brother during a fire call, leading to a confrontation that ends Borrelli's firefighting career after a serious injury. Chicago Fire - Season 5
: Firehouse 51 faces a hostile takeover attempt by Deputy District Marshal Anderson, who briefly splits up the crew by reassigning them to different houses. Key Episode Highlights originally aired from October 2016 to May 2017,
: Kelly Severide deals with a dangerous stalker (Grant) targeting Stella Kidd early in the season. Later, he considers a career move to Springfield to be with Anna Turner, a bone marrow recipient he bonded with, but ultimately decides to stay in Chicago. : Firehouse 51 faces a hostile takeover attempt
: A central arc involves Gabriela Dawson and Matthew Casey's pursuit of permanent adoption for Louie. To strengthen their case, the couple officially marries in the show's 100th episode, "One Hundred". However, they later face heartbreak when Louie's biological father, Andre, appears to claim custody.