A devastating loss reshapes the crew and forces them to confront their own vulnerabilities. With new faces joining the ranks, Firehouse 51 must adapt to changing dynamics while staying focused on saving lives.
All episodes — Season 3
S3 E1Always
Sep 23, 20148.343 min
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 to track down his whereabouts. Newhouse brings some unexpec
S3 E2Wow Me
Sep 30, 20147.943 min
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 learns more about his father’s family. Herrmann asks the rest of the M
S3 E3Just Drive the Truck
Oct 7, 20148.642 min
Tensions run high when trucks from two firehouses collide and fingers are pointed towards Cruz for his driving.
S3 E4Apologies are Dangerous
Oct 14, 20147.943 min
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.
S3 E5The Nuclear Option
Oct 21, 20148.143 min
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 crew works to get the food truck started.
S3 E6Madmen and Fools
Oct 28, 20148.142 min
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 with Herrmann.
S3 E7Nobody Touches Anything (I)
Nov 11, 20148.143 min
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 bring in Sergeant Voight and Detective Lindsey for further investigation.
S3 E8Chopper
Nov 18, 20148.543 min
The members of the firehouse spring into action when a helicopter explodes over a populated area.
S3 E9Arrest in Transit
Nov 25, 20147.843 min
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.
S3 E10Santa Bites
Dec 2, 20148.143 min
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 and home sees Casey and Dawson drifting apart.
S3 E11Let Him Die
Jan 6, 20158.243 min
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 news that his newborn has potential comp
S3 E12Ambush Predator
Jan 13, 20157.943 min
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 parenting advice.
S3 E13Three Bells (I)
Feb 3, 20158.143 min
Additional clues about Shay's death emerge. Meanwhile, Severide faces an old foe; Shay's sister arrives, inspiring the firehouse members to reflect on her life; Otis' grandmother relocates; and Boden sets out to help his dying father. The
S3 E14Call It Paradise
Feb 10, 20158.143 min
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, Severide receives a job offer, and Chief Boden clashes wit
S3 E15Headlong Toward Disaster
Feb 17, 20157.843 min
A temporary chief fills in for Boden, who is forced to take some time off for personal reasons.
S3 E16Red Rag the Bull
Mar 3, 20158.242 min
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 resulted in a child, and Dawson goes out on a do
S3 E17Forgive You Anything
Mar 10, 20156.343 min
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 to regain his active squad status while Brett and Dawson decide they n
S3 E18Forgiving, Relentless, Unconditional
Mar 17, 20157.742 min
Herrmann tries to rescue a toddler from a structure fire. Mills discovers unexpected news.
S3 E19I Am the Apocalypse
Apr 7, 20158.641 min
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 hospital is suddenly forced into quarantine.
S3 E20You Know Where to Find Me
Apr 21, 20157.343 min
Truck and squad are called to the scene of a car crash that has Mills desperately working to save the life of a driver seriously injured in the wreck. Meanwhile, Casey has some doubts about Jack Nesbitt, whose strip club he is remodeling on
S3 E21We Called Her Jellybean (I)
Apr 28, 20157.243 min
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 help Intelligence with the investigation. The crossover continues on Chic
S3 E22Category 5
May 5, 20156.741 min
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 about the integrity of Scott Rice, causing tensions to
S3 E23Spartacus
May 12, 20156.843 min
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 house, while Severide comes to question his own judgment. A dangerous warehouse blaze