Season Finale! Borrelli confronts Boden about his brother's death; Dawson gets a decision in her fight to become a foster parent; and Casey's political consultant makes him a startling offer.
S4 E22 | 05/10/16
Where the Collapse Started
Tragedy strikes one of their own; Dawson continues the fight to become a foster parent to Louie; and Severide and Kidd grow closer.
S4 E21 | 05/04/16
Kind of a Crazy Idea
Dawson decides to become a foster parent to a boy she saved in a fire; Otis gets some disturbing news about his health; and Brett and Borrelli treat a college prank gone tragically wrong.
S4 E20 | 04/26/16
The Last One for Mom
Firehouse 51 unites to help a young boy in tragic circumstances; a high-powered political consultant helps Casey navigate a potential scandal; and Cruz makes a mistake that nearly costs him his life.
S4 E19 | 04/19/16
I Will Be Walking
Casey steps up to help a teenager being bullied by a gang; Severide bonds with a detective’s son after her life is threatened; and Kidd and Herrmann go head-to-head in a test of bar knowledge.
S4 E18 | 04/06/16
On the Warpath
Brett becomes a gunman's target after witnessing a murder; Casey faces his first tough test as alderman; and Mouch and Platt tie the knot.