Chicago Fire (season 3)

The third season of Chicago Fire, an American drama television series with executive producer Dick Wolf, and producers Derek Haas, Michael Brandt, and Matt Olmstead, premiered on Tuesday, September 23, 2014, at 10 pm on NBC television network and concluded on May 12, 2015. The season contained 23 episodes.

Overview

The show follows the lives of the firefighters and paramedics working at the Chicago Fire Department at the firehouse of Engine 51, Truck 81, Squad 3, Ambulance 61 and Battalion 25.

Episode 19 served as a backdoor pilot for a new spin-off, called Chicago Med.

Cast and characters

Main cast

• Jesse Spencer as Lieutenant Matthew Casey, Truck 81 (23 episodes)
• Taylor Kinney as Lieutenant Kelly Severide, Squad 3 (23 episodes)
• Monica Raymund as Paramedic in Charge/Firefighter Candidate Gabriela Dawson, Ambulance 61/Truck 81 (23 episodes)
• Charlie Barnett as Firefighter/Paramedic in Charge Peter Mills, Squad 3/Ambulance 61 (20 episodes)
• Kara Killmer as Paramedic Sylvie Brett, Ambulance 61 (23 episodes)
• David Eigenberg as Firefighter Christopher Herrmann, Truck 81 (23 episodes)
• Yuri Sardarov as Firefighter Brian "Otis" Zvonecek, Truck 81 (23 episodes)
• Joe Minoso as Firefighter Joe Cruz, Truck 81/Squad 3 (23 episodes)
• Christian Stolte as Firefighter Randy "Mouch" McHolland, Truck 81 (23 episodes)
• Eamonn Walker as Chief Wallace Boden, Battalion 25 (23 episodes)

Recurring

• Randy Flagler as Firefighter Harold Capp, Rescue Squad 3
• Edwin Hodge as Firefighter Rick Newhouse, Rescue Squad 3 (10 episodes)
• Melissa Ponzio as Donna Robbins-Boden (10 episodes)
• Warren Christie as Firefighter Scott Rice, Rescue Squad 3 (7 episodes)
• Gordon Clapp as Chaplain Orlovsky (5 episodes)
• Kenny Johnson as Lieutenant Tommy Welch, Truck 66/Firefighter, Rescue Squad 3 (5 episodes)
• Eric Mabius as Jack Nesbitt (5 episodes)
• Yaya DaCosta as April Sexton (4 episodes)
• Izabella Miko as Katya (4 episodes)
• Richard Roundtree as Wallace Boden, Sr. (4 episodes)
• Serinda Swan as Brittany Baker (4 episodes)
• Lauren German as Leslie Shay (3 episodes, pictures and video memories)
• Dora Madison as Paramedic in Charge, Jessica "Chili" Chilton, Ambulance 61 (3 episodes)
• James Russo as Papa Lullo (3 episodes)
• Alexandra Metz as Elise Mills (2 episodes)

Crossover characters

• Amy Morton as Sergeant Trudy Platt (6 episodes)
• Brian Geraghty as Officer Sean Roman (5 episodes)
• Jon Seda as Detective Antonio Dawson (5 episodes)
• Jason Beghe as Sergeant Henry "Hank" Voight (4 episodes)
• Marina Squerciati as Officer Kim Burgess (3 episodes)
• Jesse Lee Soffer as Detective Jay Halstead (3 episodes)
• Sophia Bush as Detective Erin Lindsay (2 episodes)
• Patrick John Flueger as Officer Adam Ruzek (2 episodes)
• LaRoyce Hawkins as Officer Kevin Atwater (2 episodes)
• Samuel Hunt as Craig "Mouse" Gurwitch (1 episode)
• Kelli Giddish as Detective Amanda Rollins (1 episode)
• Mariska Hargitay as Sergeant Olivia Benson (1 episode)
• Tamara Tunie as M.E. Melinda Warner (1 episode)

Episodes

Main article: List of Chicago Fire episodes

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
47	1	"Always"	Joe Chappelle	Michael Brandt & Derek Haas	September 23, 2014	301	9.14[2]
Following the apartment fire explosion with everyone inside, everyone at Firehouse 51 survives, Mills with a broken leg, but Shay is killed on scene leaving everyone mourning her loss. The episode forwards to six weeks later where we find many in the Firehouse have taken her death hard. Severide, having been on leave after the incident, is now AWOL. Eventually, Casey finds him at his cabin where he admits he's reluctant to return. Also, Casey continues to butt heads with Lieutenant Welch at Truck 66, Boden and his wife double date with Mouch and Trudy. Hermann wishes to expand the Molly's brand, and Mills is given information about his father's family, whom his mother had told him moved away.
48	2	"Wow Me"	Tom DiCillo	Andrea Newman	September 30, 2014	302	8.71[3]
Severide returns to Firehouse 51 after Shay's death, but not as his usual self and moves in with Casey and Dawson to cope with his grief. Firehouse 51 receives a call of a man pinned down by a trailer. Meanwhile, Mills digs deeper into his family's history. Elsewhere Hermann looks into expanding Molly's. While practicing drills for her candidacy, Dawson receives a surprise proposal from Casey which she accepts.
49	3	"Just Drive the Truck"	Sanford Bookstaver	Michael Gilvary	October 7, 2014	303	8.39[4]
When Truck 81 and Truck 66 from the Austin Firehouse collide, all fingers are pointed towards Cruz for his driving and he could be facing criminal charges. Meanwhile, Cruz, Hermann and Mouch look into trucks for Molly's expansion. Elsewhere, Boden and Casey look into Dawson becoming a candidate for 81. Mills struggles with an unknown injury causing him to blackout.
50	4	"Apologies Are Dangerous"	Steve Shill	Michael Brandt & Ryan Rege Harris	October 14, 2014	304	7.11[5]
Severide gets involved in a subway shooting which questions his position at the firehouse. Meanwhile, Dawson has her first day as a candidate at Firehouse 51 and Mills adjusts to his new role as a Paramedic. Elsewhere, Brett's ex-fiancé comes to town to win her back.
51	5	"The Nuclear Option"	Joe Chappelle	Tim Talbott	October 21, 2014	305	7.45[6]
Casey receives some startling news about his sister. She and her husband Jordan are getting a divorce, Casey digs deeper into it and finds out they are broke and Jordan is having an affair and puts him in a difficult position how to tell his sister. Following a call, Hermann reaches out to Boden and questions Dawson as a candidate. Meanwhile, Mills and Dawson settle into their new job roles. Elsewhere, Severide continues to drink to help with his grief.
52	6	"Madmen and Fools"	Rod Holcomb	Tiller Russell	October 28, 2014	306	7.23[7]
While on a call the team saves a young boy who has gotten his head stuck in a balcony railing that has given way and is hanging precariously. Later, the boy is taken away from his mother for a past charge of neglect and abuse. Brett gets emotionally involved when the mother begs for her help, something Severide advises her not to do. After investigating, Brett and Severide vouch for the mother and pressure child services to return the boy. Following the call, Dawson asks Hermann to give her more training and have some faith in her while on calls to which he agrees, although he rides her to do extensive training. Elsewhere, Casey is pulling out all the stops to ensure his sister does not get railroaded in the divorce. It turns out his sister signed away her rights without understanding what she was doing. With the help of Newhouse, he is able to find dirt on Jim and his mistress and is able to push him into submission. Later, Mills accompanies Newhouse on a task for his side gig to retrieve a stolen dog. Later that night Newhouse is attacked by an unknown assailant. Also, Severide and the rest of squad prepare for their Vegas trip. When everyone backs out at the last minute, Severide asks Brett to go with him but she turns him down and says it would be a bad idea. Severide is alone in Vegas at the craps table down to his last four $25 chips when he meets a mysterious woman (played by Serinda Swan) with whom a mutual attraction is obvious. She rolls the dice for him as his 'Lucky charm' and wins twice in a row and Severide kisses her.
53	7	"Nobody Touches Anything"	Alex Chapple	Story by: Dick Wolf & Jill Weinberger Teleplay by: Matt Olmstead & Jill Weinberger	November 11, 2014	307	9.06[8]
Severide returns to the Firehouse and tells everyone that he got married in Vegas, leaving everyone stunned and skeptical. Mills is worried about Newhouse and his off-duty activities. Later on, Casey and Dawson lets Severide's wife Brittney move in with them and Severide. Firehouse 51 receive a call of a woman in a burning flipped car and race against the clock to rescue her and Mills and Brett deal with a crackhead. Elsewhere, Brett discovers Cruz's hidden talent. In the next call, a basement fire, Severide discovers a box of pictures of young children on the victim he rescued and realizes it is a crime scene of a pornographic ring. This episode begins a crossover with Law & Order: Special Victims Unit and Chicago P.D. that continues on "Chicago Crossover" and concludes on "They'll Have to Go Through Me". It is included on the Law & Order: Special Victims Unit Season 16 and Chicago P.D. Season 2 DVD sets. Guest Stars: Jason Beghe as Hank Voight; Sophia Bush as Erin Lindsay; Kelli Giddish as Amanda Rollins
54	8	"Chopper"	Jann Turner	Derek Haas & Michael A. O'Shea	November 18, 2014	308	7.75[9]
Firehouse 51 receive a call of a helicopter crash onto a building causing major chaos throughout Chicago causing many injuries. Later on, it was revealed that a remote control flying drone caused the helicopter to crash. Meanwhile, Boden and his wife go to a doctor's appointment about his upcoming child. Elsewhere, Dawson and Casey's relationship is tested while Severide's new romance escalates.
55	9	"Arrest in Transit"	Jean de Segonzac	Andrea Newman	November 25, 2014	309	6.02[10]
Dawson and Casey's relationship hits a new low when Casey shows discipline at call of a leaking tanker. Meanwhile, Cruz develops feelings for Brett and expresses them to her. Elsewhere, Mills faces the fallout of a man that died shortly after an accident.
56	10	"Santa Bites"	Holly Dale	Michael Brandt & Derek Haas	December 2, 2014	310	7.36[11]
Firehouse 51 receive a call of a house fire. Meanwhile, Mills deals with the fallout of the DOA from the previous call, Dawson and Casey's relationship takes a dramatic turn. Elsewhere, Boden awaits the arrival of his new child. Also, Molly's II has its grand opening.
57	11	"Let Him Die"	Steve Shill	Michael Gilvary	January 6, 2015	311	6.77[12]
Mills and Brett are kidnapped by thugs while on a call. Firehouse 51 teams up will the Intelligence unit to track down their whereabouts. It is later revealed that the kidnappers were involved with a previous call with Mills. Elsewhere, Hermann bonds with Boden while his newborn son is fighting for his life in the ER.
58	12	"Ambush Predator"	Joe Chappelle	Teleplay by: Tiller Russell Story by: Steve Chikerotis & Tiller Russell	January 13, 2015	312	6.66[13]
Following the discovery of Shay's death notice found at a call, Severide and Dawson look into the storage building fire where Shay was killed last year. Firehouse 51 receive a call of a car accident of a victim of one of their own. Meanwhile, Hermann drafts Otis and Cruz into his Little League games. Elsewhere, Boden and Donna bond with Boden's father. Also, Mills and Brett receive a call of domestic violence in which the victim does not want to receive treatment.
59	13	"Three Bells"	Arthur W. Forney	Jill Weinberger	February 3, 2015	313	6.52[14]
Severide begins to develop a case against an arsonist that killed Shay. He later finds out that the arsonist has multiple kills. Meanwhile, Shay's sister comes to Firehouse 51 and goes on ride alongs with the house. Elsewhere, Otis' Grandma stays with him and Cruz without Cruz's permission. Later, Firehouse 51 celebrates Shay's life with a memorial service. This episode begins a crossover with Chicago P.D. that concludes on "A Little Devil Complex". It is included on the Chicago P.D. Season 2 DVD set. Guest stars: Marina Squerciati as Kim Burgess; Brian Geraghty as Sean Roman; Jon Seda as Antonio Dawson
60	14	"Call It Paradise"	Reza Tabrizi	Matt Olmstead & Michael A. O'Shea	February 10, 2015	314	6.29[15]
It's a freezing cold day in Chicago, ambulance 61 has broken down and the weather has shut down 9-1-1 as well as other city services. While salting the sidewalk, Dawson discovers an infant girl in a cardboard box who she takes a liking to. When the mother shows up, Dawson is apprehensive about releasing the baby and is told to wait for child services. Dawson eventually tricks the woman into revealing she isn't the girl's mother and the woman pulls a gun and demands Dawson hand over the baby. The rest of the house return and the woman is convinced to leave and flees. The baby is later revealed to have been kidnapped. Elsewhere, Brett and Mills go on a call and find one teenager on drugs and another missing. When Brett goes looking for her, the girl falls into a pit and is pinned by rebar. Thanks to Cruz checking in on them, Truck 81 and Squad 3 are eventually able to rescue them. Boden's father is able to throw his party as a winter luau at Molly's. At the party, Casey meets a young woman and they go to her home together, Severide goes home and watches old tapes of Shay, and Boden and his father sit by the fire where he quietly passes away with his son hugging him and crying.
61	15	"Headlong Toward Disaster"	Joe Chappelle	Michael Gilvary	February 17, 2015	315	6.26[16]
Following his father's death, Boden takes time off to finish his father's affairs and to grieve. A new Chief fills in for him but Casey and his men find themselves doubting the Chief's judgment during a call that went wrong. Severide refuses to betray one of his colleagues at 51. An unwelcome familiar face comes to Firehouse 51 to fill in a void in Squad 3. Elsewhere, Casey finds out that the woman he had hooked up with is the new Chief's soon-to-be ex-wife and Brett gets a special visitor.
62	16	"Red Rag the Bull"	Sanford Bookstaver	Tiller Russell	March 3, 2015	316	9.07[17]
Mouch receives news that one of his sperm donations is made public and has a teenage son and considers meeting him. Firehouse 51 comes under investigation following an incident at the previous call and Chief Pridgen throws Casey under the bus for the bad call. Severide's loyalty is tested and Lieutenant Welch is given an ultimatum which could have repercussions on his future. Elsewhere, Brett and Cruz try to set up Dawson on a date.
63	17	"Forgive You Anything"	Reza Tabrizi	Teleplay by: Andrea Newman Story by: Dick Wolf & Matt Olmstead	March 10, 2015	317	8.57[18]
Boden returns to Firehouse 51 following his absence from the department to take care of his new child and his late father's personal affairs. 51 receives a call of a parking garage accident that turns dangerous. Meanwhile, Severide helps an old friend return to the firehouse while Mills fight for his position back on squad. Also, Mouch has regrets about not meeting his long lost child. Elsewhere, Dawson and Brett have a girls night out and Casey gets a contracting job to renovate the room next to a strip club.
64	18	"Forgiving, Relentless, Unconditional"	Karyn Kusama	Michael A. O'Shea & Jill Weinberger	March 17, 2015	318	6.96[19]
51 receive a call of an apartment fire with an infant in critical condition and the blame shifts toward the father. It is later revealed that the father is a crack addict and has dealt with child neglect by smoking crack in front of his child which makes Hermann furious and goes after him. Also, Brett considers options and considers breaking up with Cruz. Mills continues to fight for his spot back on squad. Severide grows closer to an old friend.
65	19	"I Am the Apocalypse"	Joe Chappelle	Teleplay by: Michael Brandt & Derek Haas Story by: Dick Wolf & Matt Olmstead	April 7, 2015	319	8.43[20]
The team transports victims of a chemical leak to Chicago Memorial, where the bad situation turns even worse due to a grenade-carrying madman who claims to have a deadly airborne disease. After the explosion everybody starts to panic and begin to flee with the doctors telling everyone to stay put and puts Chicago Memorial on lock down. Also, Severide is seriously injured and is forced to have emergency surgery, during the surgery Severide has flashbacks about his days with Shay. This episode serves as the backdoor pilot for Chicago Med.
66	20	"You Know Where to Find Me"	Jean de Segonzac	Michael Gilvary	April 21, 2015	320	6.72[21]
Mills tries to save the life of a driver seriously injured in a car accident; Casey remodels a strip club on the side, but has doubts about its owner; and Hermann, Otis and Cruz prepare their team for the peewee hockey championship. Firehouse 51 says goodbye to one of their own as Peter Mills leaves his friends and his firefighting career and moves on.
67	21	"We Called Her Jellybean"	Joe Chappelle	Teleplay by: Tiller Russell Story by: Matt Olmstead & Tiller Russell	April 28, 2015	321	6.85[22]
An apartment fire linked to a case of rape and attempted murder calls for members of the CPD to team with the Special Victims Unit, which had a similar unresolved case that has eluded them for more than 10 years. This episode begins a crossover with Chicago P.D. and Law & Order: Special Victims Unit that continues on "The Number of Rats" and concludes on "Daydream Believer". It is included on the Law & Order: Special Victims Unit Season 16 and Chicago P.D. Season 2 DVD sets. Guest stars: Mariska Hargitay as Olivia Benson; Jason Beghe as Hank Voight; Jon Seda as Antonio Dawson
68	22	"Category 5"	Dan Lerner	Andrea Newman	May 5, 2015	322	6.76[23]
Tensions run high when Otis continues to accuse Scott of his wrongdoings, which continues to irritate Severide and leads to an altercation with the truck team. Severide later asks him about it. Elsewhere, Voight contacts Casey about his previous encounter with the strip club owner, and finds out he is running a female trafficking ring, which forces Casey to go undercover. Also, Hermann invests into Chili's idea.
69	23	"Spartacus"	Michael Brandt	Michael Brandt & Derek Haas	May 12, 2015	323	6.66[24]
Tensions continue to run high at a call when the squad went in a gas-filled house without approval. Severide later finds out that Otis' accusation is true and Scott is kicked off the squad. Cruz receives a letter in the mail telling him that he passed his squad certification and is now on the squad. Elsewhere, Casey continues to go undercover to bust the strip club owner for human trafficking. Also, Hermann, Chili and Otis continue to invest in Chili's idea of chilled champagne and try to get a celebrity spokesperson to promote it.

Production

NBC renewed Chicago Fire for a third season on March 19, 2014 which premiered on September 23 that same year.

Crossovers

On September 29, 2014, it was announced that Wolf's shows Chicago P.D., Chicago Fire and Law & Order: Special Victims Unit would be doing a three-part crossover event on November 11–12, 2014, starting with Chicago Fire and ending with Law & Order: Special Victims Unit, and Chicago P.D. On January 22, 2015, another crossover between Chicago Fire, Law & Order: Special Victims Unit, and Chicago P.D. was announced, to have "more integrated storytelling" than the first. The episodes aired on April 28–29, 2015.

Ratings[edit]

No.	Title	Air date	Rating/share (18–49)	Viewers (millions)	Total (18–49)	Total viewers (millions)
1	"Always"	September 23, 2014	2.6/8	9.14[2]	3.7	12.75[30]
2	"Wow Me"	September 30, 2014	2.3/7	8.71[3]	3.4	12.32[31]
3	"Just Drive the Truck"	October 7, 2014	2.1/7	8.39[4]	3.2	11.91[32]
4	"Apologies Are Dangerous"	October 14, 2014	1.9/6	7.11[5]	3.0	10.67[33]
5	"The Nuclear Option"	October 21, 2014	1.9/6	7.45[6]	3.0	10.81[34]
6	"Madmen and Fools"	October 28, 2014	1.7/5	7.23[7]	2.7	10.52[35]
7	"Nobody Touches Anything"	November 11, 2014	2.2/7	9.06[8]	3.7	13.29[36]
8	"Chopper"	November 18, 2014	2.1/6	7.75[9]	N/A	10.94[37]
9	"Arrest in Transit"	November 25, 2014	1.6/5	6.02[10]	2.8	9.84[38]
10	"Santa Bites"	December 2, 2014	1.7/5	7.36[11]	2.8	10.94[39]
11	"Let Him Die"	January 6, 2015	1.7/5	6.77[12]	2.9	10.29[40]
12	"Ambush Predator"	January 13, 2015	1.5/5	6.66[13]	2.5	9.92[41]
13	"Three Bells"	February 3, 2015	1.6/5	6.52[14]	2.7	10.07[42]
14	"Call It Paradise"	February 10, 2015	1.4/5	6.29[15]	2.6	9.90[43]
15	"Headlong Toward Disaster"	February 17, 2015	1.4/4	6.26[16]	2.5	9.85[44]
16	"Red Rag the Bull"	March 3, 2015	2.1/7	9.07[17]	3.2	12.50[45]
17	"Forgive You Anything"	March 10, 2015	2.1/7	8.57[18]	3.2	11.92[46]
18	"Forgiving, Relentless, Unconditional"	March 17, 2015	1.6/5	6.96[19]	2.7	10.37[47]
19	"I Am the Apocalypse"	April 7, 2015	2.0/6	8.43[20]	N/A	N/A
20	"You Know Where to Find Me"	April 21, 2015	1.6/5	6.72[21]	N/A	N/A
21	"We Called Her Jellybean"	April 28, 2015	1.6/5	6.85[22]	N/A	N/A
22	"Category 5"	May 5, 2015	1.6/5	6.76[23]	N/A	N/A
23	"Spartacus"	May 12, 2015	1.5/5	6.66[24]	N/A	N/A

Chicago Fire (season 4)

The fourth season of Chicago Fire, an American drama television series with executive producer Dick Wolf, and producers Derek Haas, Michael Brandt, and Matt Olmstead, was ordered on February 5, 2015, by NBC, and premiered on October 13, 2015 and concluded on May 17, 2016. The season contained 23 episodes.

Overview

The show follows the lives of the firefighters and paramedics working at the Chicago Fire Department at the firehouse of Engine 51, Truck 81, Squad 3, Ambulance 61 and Battalion 25.

Cast and characters

Main cast

• Jesse Spencer as Lieutenant Matthew Casey, Truck 81
• Taylor Kinney as Lieutenant/Firefighter Kelly Severide, Squad 3
• Monica Raymund as Firefighter Gabriela Dawson, Truck 81
• Kara Killmer as Paramedic/Paramedic In Charge Sylvie Brett, Ambulance 61
• David Eigenberg as Firefighter Christopher Herrmann, Truck 81
• Yuri Sardarov as Firefighter Brian "Otis" Zvonecek, Truck 81
• Joe Minoso as Firefighter Joe Cruz, Squad 3
• Christian Stolte as Firefighter Randy "Mouch" McHolland, Truck 81
• Dora Madison as Paramedic in Charge/Paramedic Jessica "Chili" Chilton, Ambulance 61 (Episodes 1-14)
• Steven R. McQueen as Firefighter Candidate/Paramedic Jimmy Borelli, Truck 81/ Ambulance 61
• Eamonn Walker as Chief Wallace Boden, Battalion 25

Recurring

• The Cohen Twins (Aiden & Austin Cohen) as Louie
• Randy Flagler as Firefighter Harold Capp, Rescue Squad 3
• Anthony Ferraris as Firefighter Tony Ferraris, Rescue Squad 3
• DuShon Brown as Connie
• Brian J. White as Captain/Battalion Chief Dallas Patterson, Rescue Squad 3/ Firehouse 51/ Firehouse 90
• Miranda Rae Mayo as Firefighter Stella Kidd, Truck 81
• Treat Williams as Benjamin "Benny" Severide
• Melissa Ponzio as Donna Robbins-Boden
• Robyn Coffin as Cindy Herrmann
• Brandon Jay McLaren as Danny Booker
• Jenny Mollen as Detective Bianca Holloway
• Holly Robinson Peete as Tamara Jones
• Lauren Stamile as Susan Weller
• Guy Burnet as Grant Smith
• Gordon Clapp as Chaplain Orlovsky
• Liza J. Bennett as Agent Alex Ward
• Deanna Reed-Foster as Tina Cantrell
• Rachel Nichols as Jamie Killian
• Fredric Lehne as Deputy District Chief Ray Riddle
• Tom Amandes as Detective Ryan Wheeler
• Ilfenesh Hadera as Serena Holmes
• Mark Hengst as Roger Maddox
• Ralph Rodriguez as Freddie Clemente
• Susannah Flood as Athena Bailey-Johnson
• Andy Ahrens as Firefighter Danny Borelli, Engine 67
• Eric Mabius as Jack Nesbitt

Crossover characters

• Nick Gehlfuss as Dr. Will Halstead
• Jason Beghe as Sergeant Henry "Hank" Voight
• Jon Seda as Detective Antonio Dawson
• Oliver Platt as Dr. Daniel Charles
• Yaya DaCosta as April Sexton
• Patrick John Flueger as Officer Adam Ruzek
• LaRoyce Hawkins as Officer Kevin Atwater
• Marina Squerciati as Officer Kim Burgess
• Amy Morton as Desk Sergeant Trudy Platt
• Brian Geraghty as Officer Sean Roman
• Elias Koteas as Detective Alvin Olinsky
• Colin Donnell as Dr. Connor Rhodes
• Rachel DiPillo as Sarah Reese
• Brian Tee as Dr. Ethan Choi
• Marlyne Barrett as Maggie Lockwood
• Samuel Hunt as Craig "Mouse" Gurwitch
• Barbara Eve Harris as Deputy Chief Emma Crowley
• Chris Agos as Assistant State's Attorney Steve Kot
• Armand Schultz as Alderman Colin Becks

Episodes[edit]

Main article: List of Chicago Fire episodes

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
70	1	"Let It Burn"	Joe Chappelle	Andrea Newman & Michael Gilvary	October 13, 2015	401	7.37[4]
Casey is placed in a dangerous situation while working undercover to bring down a trafficking ring being run out of Nesbitt's club. The squad's high turnover rate results in an unwelcome surprise for Severide. In other events, Dawson recognizes that her life is about to change; a new candidate makes an unusual first impression; and residents band together to protest a drug den in their neighborhood.
71	2	"A Taste of Panama City"	Sanford Bookstaver	Tiller Russell	October 20, 2015	402	7.64[5]
Following her pregnancy announcement, Dawson is forced behind a desk to investigate fires. Meanwhile, Severide struggles with his new role, and Casey continues his investigation into Nesbitt. Also, Molly's is threatened with closure following a noise complaint.
72	3	"I Walk Away"	Tom DiCillo	Sarah Kucserka & Veronica West	October 27, 2015	403	7.80[6]
51 receives a call in the same troubled neighborhood of a man with a crushed foot which leads into the wife of the victim giving Boden evidence of the previous incident that could clear Boden's name. Meanwhile, candidate Jimmy Borrelli's (guest star Steven R. McQueen) brother meddles in trying to get him moved into a different house. Dawson looks into an arson investigation that puts Boden in hot water. Also, Brett gets attached to a previous call. Dawson suddenly suffers from abdominal pain and collapses.
73	4	"Your Day Is Coming"	Reza Tabrizi	Jill Weinberger	November 3, 2015	404	8.11[7]
Dawson is rushed into emergency surgery following her collapse, which results in her losing the baby leaving her and Matt devastated. In honor of Dawson, Severide and Boden seek to help close her arson case. Also, after Molly's receives a notice of closure following a code violation, Borrelli seeks the help from one of his construction friends to help get it back open.
74	5	"Regarding This Wedding"	Joe Chappelle	Michael A. O'Shea	November 10, 2015	405	8.15[8]
51 receives a call to a fire at a house where a wedding was about to take place but the groom is rushed to the hospital trying to save his bride. Later, Dawson, Brett, and Chili have an idea to host their wedding at the firehouse, which Chief Boden at first doesn't agree with. Meanwhile, Dawson is cleared to be back to work as a firefighter, but Riddle tells her he doesn't want her to. Also, Boden's leadership is questioned by Riddle.
75	6	"2112"	Holly Dale	Ian McCulloch	November 17, 2015	406	7.95[9]
Tensions only get worse between Patterson and Severide when Severide makes a call at a job without his consent causing Patterson to question Severide's being at 51. Meanwhile, Borelli and Chili take their romance to the next level, Cruz receives a visit from one of his brother Leon's old gang members. Also, Mouch receives tickets from one of the members of the rock band Rush and Boden and his wife Donna welcome a new neighbor who turns out to be overly friendly. Guest appearances by Rush members Alex Lifeson and Geddy Lee.
76	7	"Sharp Elbows"	Dan Lerner	Tiller Russell & Liz Alper & Ally Seibert	November 24, 2015	407	7.34[10]
Boden could face criminal assault charges following an incident with his neighbor which leads to Voight helping out. Meanwhile, tensions continue with Captain Patterson which leads to Severide's father obtaining information that could bring Patterson down. Also, Chili and Borelli continue their romance, Otis asks out Brett to the Chicago Fire Department gala and Cruz helps out an old friend.
77	8	"When Tortoises Fly"	Haze Bergeron	Michael Gilvary	December 1, 2015	408	8.62[11]
Boden's situation goes from bad to worse after Donna confronts their neighbor and she is reported missing. Detective Wheeler later searches his home. A state attorney stops by 51 to see Boden about the Maddox case. This conversation puts Boden on to the possibility that Maddox is the one setting him up which is later confirmed when Boden confronts him. During a call, Hermann rescues a tortoise that he believed was a "robot". Mouch takes a liking to the animal which they find out belongs to a John Doe to whom Chili and Brett had been called. Another call has Truck and Squad dealing with a Peeping Tom trapped in the ventilation system at a local gym. He tries to escape from the roof, but is tackled by Severide. Chili is late to shift and given "strike one" by Boden. Jimmy later finds Chili's apartment in disarray and she appears to be intoxicated. When he asks her what is going on, she avoids the issue by seducing him. After shift at Molly's, the crew relax until Wheeler shows up and officially arrests Boden.
78	9	"Short and Fat"	Joe Chappelle	Michael Brandt & Derek Haas	December 8, 2015	409	9.13[12]
Following Boden's arrest, Patterson is promoted to chief of Firehouse 51 much to everyone's dismay. Later on, Patterson sets new rules for the house that makes everyone uncomfortable, especially Chili and Borelli. Meanwhile, Severide continues to help strengthen Boden's case. Also, Dawson receives heat at a previous call when she had an outburst at a citizen and was recorded.
79	10	"The Beating Heart"	Reza Tabrizi	Andrea Newman	January 5, 2016	410	7.43[13]
Hermann is rushed to Chicago Med after being stabbed at Molly's. After losing a lot a blood, it is determined he needs emergency surgery. Feeling guilty about Hermann's present state, Cruz searches for Freddy to turn him in. Severide is reinstated as Lieutenant while Borelli grows more concerned about Chili's erratic behavior. Mouch considers finally proposing to Platt. This episode begins a crossover with Chicago Med and Chicago P.D. that continues on "Malignant" and concludes on "Now I'm God". It is included on the Chicago Med Season 1 and Chicago P.D. Season 3 DVD sets.
80	11	"The Path of Destruction"	Drucilla Carlson	Sarah Kucserka & Veronica West	January 19, 2016	411	8.16[14]
The city of Chicago prepares for a dangerous tornado. Meanwhile, Hermann returns to 51 after his health scare, but his wife thinks it's too early for him to return. Chili's erratic behavior continues, and she calls out Borelli and almost kills a victim while at a call. Later on, the tornado hits a Chicago neighborhood. It is Hermann's neighborhood and concern grows for his family's safety. Also, Dawson helps Otis on how to find a date.
81	12	"Not Everyone Makes It"	Reza Tabrizi	Tiller Russell	January 26, 2016	412	8.46[15]
Brett turns to Boden for Chili's erratic behavior which could cost her job. Meanwhile, Hermann testifies against Freddy about his near fatal stabbing. Also, Casey helps out at the homeless shelter following the tornado devastation. Severide helps out an agent with an homicide case.
82	13	"The Sky Is Falling"	Joe Chappelle	Michael Brandt & Michael A. O'Shea	February 2, 2016	413	8.18[16]
Chili's erratic behavior reaches another level when she asks Chief Boden to transfer Brett to another house after Brett discovers that Chili's behavior affected her in another house. Meanwhile, Firehouse 51 prepares for a terrorist threat in Chicago. Elsewhere, Hermann signs Borelli up for a charity boxing match with the police and Casey investigates the missing money from the fundraiser that was supposed to help the citizens from the tornado.
83	14	"All Hard Parts"	Sanford Bookstaver	Jill Weinberger	February 9, 2016	414	8.13[17]
Severide confronts Chili about her erratic behavior and drinking problem which leads to Boden forcing her out of 51. Meanwhile, Borelli and Antonio battle it out in the boxing ring. Also, Casey considers running for alderman. Note: Last appearance of Jessica "Chili" Chilton (Dora Madison)
84	15	"Bad For the Soul"	Jann Turner	Andrea Newman & Michael Gilvary	February 16, 2016	415	7.53[18]
Severide and Cruz investigate a call at a firehouse that might not be an accident. Meanwhile, following Chili's termination, Borelli is reassigned to ambulance 61 after a union rule pushes him out. Also, Casey officially runs for alderman and asks everyone at 51 for their help. A new firefighter, Stella Kidd (Miranda Rae Mayo) is introduced as the new member of Truck 81.
85	16	"Two Ts"	Reza Tabrizi	Derek Haas & Ian McCulloch	February 23, 2016	416	7.80[19]
Casey's run for alderman takes a bad turn when billboards about his personal life go up. Meanwhile, Brett and Borelli investigate a possible kidnapping case with the help of Officer Sean Roman and Nurse Maggie Lockwood. Also, the guys at 51 try to throw Mouch a bachelor party, but Trudy's half brother takes charge of it. It is revealed that Severide and Kidd have an awkward past.
86	17	"What Happened to Courtney"	Jeffrey Hunt	Story by: Matt Olmstead Teleplay by: Liz Alper & Ally Seibert	March 29, 2016	417	8.66[20]
A decomposed body is found stuck in a chimney and Severide suspects that it might be a missing child. Meanwhile, Casey's campaign hits a minor snag when his opponent criticizes him for wanting to be both a fireman and an alderman at the same time, and Dawson throws a party for Casey at Molly's.
87	18	"On the Warpath"	Joe Chappelle	Sarah Kucserka & Veronica West	April 5, 2016	418	7.68[21]
Brett gets mugged and her identity stolen while at a call. Meanwhile, Casey has his first week as elected Alderman, Mouch begins to get cold feet when his wedding nears. Also, Otis begins to regret not asking out Brett.
88	19	"I Will Be Walking"	Sanford Bookstaver	Tiller Russell	April 19, 2016	419	8.17[22]
Casey deals with Alderman issues relating to a boy taking the heat for his brother's gang activities. Kidd and Herman have a Bar Olympics to see who is the better bar manager. Otis has bad bruising on his back and hip and goes to Dr. Halstead to get it checked out. Severide deals with Detective Holloway's son who she keeps dropping off at the house, despite his apparent disinterest in fire fighters. The house responds to a distillery fire. Jimmy has an awkward situation with a patient.
89	20	"The Last One for Mom"	Fred Berner	Story by: Matt Olmstead Teleplay by: Gwen Sigan	April 26, 2016	420	8.22[23]
Severide is forced into a difficult situation when he watches Detective Holloway's son while his mother is shot and killed. Meanwhile, Casey receives a bribe in the mail and immediately turns it into the police but then later faces the Board of Ethics. Also, Brett finds out that Otis doesn't want to know his diagnosis and Cruz feels guilty at a previous call.
90	21	"Kind of a Crazy Idea"	Joe Chappelle	Andrea Newman & Michael Gilvary	May 3, 2016	421	7.79[24]
Dawson begins to get attached to a foster child after saving him after a last call. Meanwhile, Severide looks into upgrades for Firehouse 51, but is hitting walls and asks Casey for his political help. Also, Brett and Cruz bring in Otis' grandmother in order to convince him to go to the hospital fearing the worst and Kidd pitches ideas for Molly's.
91	22	"Where the Collapse Started"	Sanford Bookstaver	Sarah Kucserka & Veronica West	May 10, 2016	422	7.98[25]
Boden makes a life or death call at a building collapse scene when Jimmy returns to rescue his brother. Meanwhile, Dawson continues to pursue fostering Louie. While on medical leave, Otis meets his temporary replacement fearing that it might be permanent. Also, Casey and Antonio butt heads when he finds out that Casey is not helping Dawson out.
92	23	"Superhero"	Michael Brandt	Story by: Ian McCulloch & Michael A. O'Shea Teleplay by: Michael Brandt & Derek Haas	May 17, 2016	423	7.91[26]
Borelli deals with the fallout of the death of his brother Danny and takes it out on Boden. Meanwhile, Dawson is forced to find an apartment so she can foster Louie, Kidd continues to deal with her ex-husband. Also, Casey travels to an Alderman conference and Otis returns to 51. At the end of the episode, Severide and Kidd return to his apartment, but do not notice that Kidd's ex-husband is hiding there with a knife.

Ratings[edit]

No.	Title	Air date	Rating/share (18–49)	Viewers (millions)	Total (18–49)	Total viewers (millions)
1	"Let It Burn"	October 13, 2015	1.8/6	7.37[4]	2.9	10.80[27]
2	"A Taste of Panama City"	October 20, 2015	1.6/5	7.64[5]	2.9	11.44[28]
3	"I Walk Away"	October 27, 2015	1.9/6	7.80[6]	3.1	11.71[29]
4	"Your Day Is Coming"	November 3, 2015	1.8/6	8.11[7]	2.9	11.76[30]
5	"Regarding This Wedding"	November 10, 2015	2.0/7	8.15[8]	2.8	11.73[31]
6	"2112"	November 17, 2015	1.9/6	7.95[9]	3.0	11.44[32]
7	"Sharp Elbows"	November 24, 2015	1.8/6	7.34[10]	2.9	11.05[33]
8	"When Tortoises Fly"	December 1, 2015	1.9/6	8.62[11]	2.9	11.89[34]
9	"Short and Fat"	December 8, 2015	2.0/7	9.13[12]	3.1	12.63[35]
10	"The Beating Heart"	January 5, 2016	1.8/6	7.43[13]	2.9	11.22[36]
11	"The Path of Destruction"	January 19, 2016	1.8/6	8.16[14]	2.9	11.91[37]
12	"Not Everyone Makes It"	January 26, 2016	1.8/6	8.46[15]	2.8	11.80[38]
13	"The Sky Is Falling"	February 2, 2016	1.8/6	8.18[16]	2.9	11.88[39]
14	"All Hard Parts"	February 9, 2016	1.8/6	8.13[17]	2.8	11.52[40]
15	"Bad For the Soul"	February 16, 2016	1.6/5	7.53[18]	2.6	11.17[41]
16	"Two T's"	February 23, 2016	1.6/5	7.80[19]	2.7	11.41[42]
17	"What Happened to Courtney"	March 29, 2016	1.7/6	8.66[20]	2.8	12.27[43]
18	"On the Warpath"	April 5, 2016	1.5/5	7.68[21]	2.6	11.47[44]
19	"I Will Be Walking"	April 19, 2016	1.7/6	8.17[22]	2.7	11.79[45]
20	"The Last One for Mom"	April 26, 2016	1.7/6	8.22[23]	2.7	11.63[46]
21	"Kind of a Crazy Idea"	May 3, 2016	1.6/5	7.79	2.6	11.18[47]
22	"Where the Collapse Started"	May 10, 2016	1.6/6	7.98	2.6	11.52[48]
23	"Superhero"	May 17, 2016	1.7/6	7.91	2.7	11.51[49]