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23 Episodes 2014 - 2015
Episode 1
Tue, Sep 23, 201443 mins
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. Meanwhile, Newhouse brings some unexpected news regarding one of Mills' relatives while Herrmann and Otis make some new goals regarding Molly's.

Episode 2
Tue, Sep 30, 201460 mins
Lieutenant 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. Meanwhile, Mills learns more about his father's family and Herrmann asks the potential Molly investors to come up with new ideas to turn the business around.

Episode 3
Tue, Oct 7, 201442 mins
Truck 81 goes out on a call and Truck 66 also goes. Knowing that whoever gets there first will be in charge, Cruz wants to step on it but Casey tells him no. But when they and the other truck crash, one of the other team's members is in critical condition. An initial investigation hints that Cruz was careless. And Walsh and his men are blaming Cruz for the man's condition. When Mills has a fainting spell, Severide tells him to see the doctor. Boden tells Mills that it was his father's wish to reunite with his family. Boden tells Casey there could be a way for Dawson to join the squad but will require a sacrifice on their part.

Episode 4
Tue, Oct 14, 201442 mins
Dawson tries to strike a balance with Casey during her first day as a candidate. Meanwhile, Mills ponders an uncertain future; Severide faces his demons; and a city inspector visits Molly's.

Episode 5
Tue, Oct 21, 201443 mins
Lieutenant Casey (Jesse Spencer) deals with the fallout of his sister Christie's (guest star Nicole Forester) impending divorce. Meanwhile, Dawson (Monica Raymund) and Mills (Charlie Barnett) settle into their new roles at Station 51. Elsewhere, Brett (Kara Kilmer) can't decide if she wants to leave Chicago and the Molly's crew still can't figure out how to get the food truck started.

Episode 6
Tue, Oct 28, 201442 mins
Casey continues to battle his sister's husband over giving her a fair settlement. But he finds ways to keep Casey at bay. So Casey turns to Newhouse for help. Newhouse asks Mills help with a side job he has but someone shoots at them while he's doing it. When they save a boy, children's services shows up and takes the boy away from his mother. It seems like she has a history of abuse and neglect. The mother pleads with Brett to help her. Severide warns her not to get involved. But she convinces him they have to try and they learn she might be straight so they go to child services but the one in charge says he's too busy. Dawson finds herself being told by Hermann she needs to put in more and she does which causes her to feel like she's never going to be accepted.

Episode 7
Tue, Nov 11, 201442 mins
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.

Episode 8
Tue, Nov 18, 201443 mins
The members of the firehouse spring into action when a helicopter explodes over a populated area.

Episode 9
Tue, Nov 25, 201442 mins
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.

Episode 10
Tue, Dec 2, 201443 mins
A house fire puts a couple in danger. Dawson and Casey are pushed further apart by an unsettling surprise. The Chicago Holiday Fest gives Molly's II a chance to shine. The Chicago FD Chaplain hopes to help out a local soup kitchen with "fill the boot" donations.

Episode 11
Tue, Jan 6, 201543 mins
The firehouse receives unsettling news when two of their own come up missing following a routine call, prompting members of Chicago P.D. to lead the search. Meanwhile, Casey and Dawson have a hard time figuring how to juggle their personal and professional lives. Elsewhere, Chief Boden and Donna struggle with news that their newborn has potential complications and they receive a surprise out-of-town visitor

Episode 12
Tue, Jan 13, 201543 mins
Severide and Dawson discover startling evidence found at a storage unit fire that appears connected to the fire that took Shay's life. Meanwhile, the firehouse bands together when Chaplain Orlovsky is the victim of a bad car accident.

Episode 13
Tue, Feb 3, 201543 mins
More clues emerge about the fire that killed Shay, leading Severide to a former nemesis; Shay's sister visits; Cruz is faced with a surprise; Boden tries to help his father.

Episode 14
Tue, Feb 10, 201543 mins
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 with his father over his treatment.

Episode 15
Tue, Feb 17, 201543 mins
Interim Chief Pat Pridgen (guest star Matthew Del Negro) is brought over to temporarily fill in for Boden (Eamonn Walker), who is left to tend to his personal affairs. When tension is sparked as the result of his derisive leadership, the absence of Chief Boden (Eamonn Walker) becomes all too apparent. Meanwhile, Lieutenant Severide (Taylor Kinney) must deal with a most unwelcome addition to his squad, Brett (Kara Killmer) gets closer to a girl she previously rescued and Casey (Jesse Spencer) starts seeing a new woman, Beth (guest star Bree Williamson), but interesting complications quickly unfold.

Episode 16
Tue, Mar 3, 201542 mins
In an effort to further cover himself from any wrongdoing, Pridgen will enlist the help of Lt. Welch, who is faced with the choice of whether to fit in with the firehouse or follow his superiors self-serving orders. Elsewhere, Mouch is going to be floored upon learning that his donation to a fertility clinic has resulted in a child who, now a young adult, wants to meet him. In the meantime, Brett and a reluctant Cruz are going to take Dawson out on a double date and Boden will focus his efforts on his duties at home as a father.

Episode 17
Tue, Mar 10, 201543 mins
Severide's old friend arrives, hoping for a second chance with the Chicago Fire Department. Meanwhile, Mills tries to regain his active squad status, Mouch confronts his fear about meeting his child, and Brett and Dawson set out to have a big night out.

Episode 18
Tue, Mar 17, 201542 mins
Herrmann saves an infant in a structural fire, then goes on a quest to solve dubious circumstances about the event. Meanwhile, Severide retraces important friendships from his youth, and Cruz and Brett's relationship reaches a critical juncture.

Episode 19
Tue, Apr 7, 201542 mins
A man blows himself up, claiming to have something worse than Ebola. Meanwhile members of Chicago Med and Chicago Fire try to handle the situation as best they can. Kelly battles for his life when he's severely injured while attempting to stop the suicide bomber.

Episode 20
Tue, Apr 21, 201543 mins
Mills is back on squad. His sister and mother show up and tell him that they've decided to move to North Carolina and run the restaurant his grandfather left them. They want him to join them. Casey continues to do renovation work at a strip club and the owner makes him an offer that he doesn't like. The Chaplain talks to Cruz and Otis about Hermann's coaching of the PeeWee hockey team because of the upcoming championship. And Kelly goes to see April and sees that she's going away for awhile.

Episode 21
Tue, Apr 28, 201543 mins
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.

Episode 22
Tue, May 5, 201542 mins
At Sgt. Voight's urging, a determined Lt. Casey agrees to go undercover in an effort to provide proof of Jack Nesbitt shady dealings. Meanwhile, Otis and Severide continue to disagree about the integrity of Scott Rice, causing tensions to flare between members of truck and squad. Meanwhile, Herrmann helps out a fellow member of the firehouse.

Episode 23
Tue, May 12, 201543 mins
Casey puts his life on the line and digs deeper into the shady dealings of Jack Nesbitt. With members of truck and squad at odds over Rice actions in the field, Chief Boden is left to figure out how to create unity in a divided house, while Severide comes to question his own judgment. A dangerous warehouse blaze quickly gets out of control and threatens members of firehouse 51, prompting Boden and Cruz to risk everything to save their own. Elsewhere, Dawson gets some life-changing news.
