Lt. Casey puts his life on the line and digs deeper into the shady dealings of Jack Nesbitt. Chief Boden must figure out how to create unity in a divided…

In part one of the crossover with Chicago P.D.: Additional clues about Shay’s death emerge. Meanwhile, Severide faces an old foe; Shay’s sister arrives, inspiring the firehouse members to reflect…

An ice storm hits, forcing a citywide lockdown. Mills and Brett are left stranded in the elements while searching for a teen, and the firehouse members babysit a newborn. Elsewhere,…

A temporary chief fills in for Boden, who is forced to take some time off for personal reasons.

The interim chief makes a tactical error during an apartment fire, stirring up tensions and putting careers in jeopardy. Meanwhile, Mouch discovers that his donation to a fertility clinic has…

Severide lobbies Chief Boden for a favor for Scott Rice, an old friend needing a second chance with the CFD, but Casey and Otis have their doubts. Elsewhere, Mills works…

Herrmann tries to rescue a toddler from a structure fire. Mills discovers unexpected news.

The Chicago fire team works seamlessly with Chicago Med personnel to help aid victims of a deadly gas leak, but things quickly take a turn for the worse when the…

The teams will track a Ted Bundy-esque killer who hunted in New York and in Chicago. This crossover event will go back and forth between the two cities, integrating the…

An apartment fire connected to a case of rape and attempted murder resembles an unsolved case in New York, so Sgt. Benson of Special Victims Unit comes to Chicago to…

At Sgt. Voight’s urging, a determined Lt. Casey agrees to go undercover in an effort to provide proof of Jack Nesbitt’s shady dealings. Meanwhile, Otis and Severide continue to disagree…

A house fire sees the team attempting to save the lives of a couple trapped inside. Chief Boden prepares to start his new family. The combination of life at work…

Two firehouse members are abducted, triggering a desperate search by the Chicago P.D. Elsewhere, Casey and Dawson struggle to balance their personal and professional lives, and Chief Boden deals with…

Severide and Dawson unearth shocking evidence about the fire that killed Shay. Elsewhere, the firehouse bonds over a serious car accident, and Chief Boden’s father visits, only to give unsolicited…

Boden forces members of Firehouse 51 to pull themselves back together in the aftermath of a harrowing fire explosion. While Severide goes missing for one week too many, Casey works…

Severide returns to Firehouse 51, but he is clearly not his usual self. Dawson counts down the weeks until she gets started as a candidate at the Austin Firehouse. Mills…

Tensions run high when trucks from two firehouses collide and fingers are pointed towards Cruz for his driving.

Dawson tries to strike a balance with Casey during her first day as a candidate. Mills ponders an uncertain future. Severide faces his demons. A city inspector visits Molly’s.

Casey deals with the aftereffects of his sister’s divorce announcement. Dawson and Mills get used to their new roles at Station 51. Brett ponders whether to leave Chicago. The Molly’s…

Casey faces his corrupt brother-in-law and Brett goes above and beyond to help a mother in need. Meanwhile, Mills get an education on unlicensed private investigation and Dawson begins training…

In part one of the crossover with Law & Order: During a house fire, Firehouse 51 rescues the owner from the cellar clutching a suspicious box, leading Lt. Severide to…

The members of the firehouse spring into action when a helicopter explodes over a populated area.

Dawson and Casey’s relationship is tested as the team responds to a truck leaking hydrochloric acid in a busy intersection. Severide learns about Brittany’s past. Mouch has dating troubles.