Chicago Fire

Boden (Eamonn Walker) forces members of Firehouse 51 to pull themselves back together in the aftermath of a harrowing fire explosion. When Severide (Taylor Kinney) goes missing for one week too many, Casey (Jesse Spencer) works to track down his whereabouts. Meanwhile, Newhouse (Edwin Hodge) brings some unexpected news regarding one of Mills' (Charlie Barnett) relatives while Herrmann (David Eigenberg) and Otis (Yuri Sardarov) make some new goals regarding Molly's.

Lieutenant Severide (Taylor Kinney) returns to Firehouse 51, but he is clearly not his usual self and Dawson (Monica Raymund) counts down the weeks until she gets started as a candidate at the Austin Firehouse. Meanwhile, Mills (Charlie Barnett) learns more about his father's family and Herrmann (David Eigenberg) asks the rest of the Molly investors to come up with some new ideas to turn the business around.

Fingers get pointed and tempers flare between members of Firehouse 51 and the Austin firehouse when fire trucks collide en route to a perilous call. Meanwhile, Boden (Eamonn Walker) has a plan to get Dawson (Monica Raymund) her badge, but it comes at a cost. Elsewhere, Mills (Charlie Barnett) confronts his past and his future on the same day and the Molly's crew hits some hurdles starting up their new food truck.

Dawson (Monica Raymund) starts her first day as a candidate and looks to find a balance with Lieutenant Casey (Jesse Spencer) inside the firehouse. Mills (Charlie Barnett) must come to terms with a future that doesn't include the squad. Meanwhile, Severide (Taylor Kinney) confronts his demons in an unexpected way and the Molly's crew has a date with the city inspector to make sure their food truck is up to code.

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.

Casey (Jesse Spencer) comes to the aid of his sister Christie (guest star Nicole Forester) and faces down his corrupt brother-in-law; while Brett (Kara Killmer) goes above and beyond for a mother in need. Elsewhere; Mills (Charlie Barnett) gets educated on the exciting world of unlicensed private investigation and Dawson (Monica Raymond) begins training with Herrmann (David Eigenberg). Taylor Kinney; Eamonn Walker; Yuri Sardarov; Joe Minoso and Christian Stolte star. Randy Flagler and Edwin Hodge guest star.

Members of Firehouse 51 are forced to contend with a house fire, but when the injured owner is rescued from his cellar clutching a suspicious box, Lt. Severide (Taylor Kinney) brings in Sergeant Voight (guest star Jason Beghe, Chicago P.D.) and Detective Lindsay (guest star Sophia Bush, Chicago P.D.) into the mix for further investigating. Elsewhere, Mills (Charlie Barnett) wonders if the dangers of Newhouses's (guest star Edwin Hodge) off-duty gig are worth the cash returns, while Molly's II is in dire need of a good chef.

When a massive helicopter explosion in a densely populated area leaves a trail of debris scattered across a full city block, members of the firehouse spring into action as lives hang in the balance. Squad 3 finds itself in a precarious position, Brett (Kara Killmer) is cornered by a dangerous man in the midst of the madness and Dawson (Monica Raymund) is shocked to discover what actually brought the chopper down.

When the team responds to a semi-truck leaking hydrochloric acid in a busy intersection, Casey (Jesse Spencer) and Dawson (Monica Raymund) find their relationship being put to the test. Meanwhile, Severide (Taylor Kinney) learns more about Brittany's (guest star Serinda Swan) past and Mouch (Christian Stolte) has some difficulties in his dating life.

A house fire leads members of the truck and squad to race to save the lives of the couple trapped inside, and then are faced with the perplexing aftermath. Meanwhile, Chief Boden (Eamonn Walker) prepares to start his new family, while the combination of life at work and home pushes Casey (Jesse Spencer) and Dawson (Monica Raymund) apart. Elsewhere Molly's II has its chance to shine at the Chicago Holiday Fest.

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 complications.

Severide (Taylor Kinney) and Dawson (Monica Raymund) 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 (guest star Gordon Clapp) is the victim of a bad car accident. Elsewhere, Chief Boden's (Eamonn Walker) father (guest star Richard Roundtree) visits, but quickly wears out his welcome with his unsolicited parenting advice.

More clues surface surrounding the fire that killed Shay, leading Severide (Taylor Kinney) to a most unexpected source who may be able to provide pertinent information. Meanwhile, Shay's sister Megan (guest star Ellen Woglom) comes to town, prompting members of the firehouse to remember Shay's life. Elsewhere, Cruz (Joe Minoso) is in for a surprise when Otis's (Yuri Sardarov) grandmother moves into their apartment, while Boden finds a way to help his dying father (guest star Richard Roundtree) make the most of his last few weeks.

Mills (Charlie Barnett) and Brett (Kara Kilmer) race to recover a missing teenager and are left stranded in the unforgiving elements, while the rest of Firehouse 51 babysits an abandoned newborn. Meanwhile, Lt. Severide (Taylor Kinney) receives an interesting job proposal and Chief Boden (Eamonn Walker) finds himself at odds with his father (guest star Richard Roundtree) over his treatment and the planning of a big party in his honor.

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.

Chief Pridgen (guest star Matthew Del Negro) comes under fire after making a tactical error during an apartment fire for which he throws Lt. Casey (Jessie Spencer) under the bus, leading Lt. Severide (Taylor Kinney) to take it upon himself to clear the problem. In an effort to further cover himself from any wrongdoing, Pridgen enlists the help of Lt. Welch (guest star Kenny Johnson), who is faced with the choice of whether to fit in with the firehouse or follow his superiors self-serving orders. Elsewhere, Mouch (Christian Stolte) is floored upon learning that his donation to a fertility clinic has resulted in a child who, now a young adult, wants to meet him. Meanwhile, Brett (Kara Killmer) and a reluctant Cruz (Joe Minoso) take Dawson (Monica Raymund) out on a double date and Boden (Eamonn Walker) focuses his efforts on his duties at home as a father.

Lt. Severide (Taylor Kinney) lobbies Chief Boden (Eamonn Walker) for a favor for Scott Rice (guest star Warren Christie), an old friend needing a second chance with the CFD, but Casey (Jesse Spencer) and Otis (Yuri Sardarov) have their doubts. Elsewhere, Mills (Charlie Barnett) works to regain his active squad status while Brett (Kara Killmer) and Dawson (Monica Raymund) decide they need a big night out.

During a harrowing call to a structure fire, Herrmann (David Eigenberg) rescues a trapped toddler, but the questionable circumstances surrounding the event sends him on a personal mission to locate the father and get to the bottom of the situation. Severide (Taylor Kinney) makes up for lost time by retracing key friendships from his adolescence, while Mills (Charlie Barnett) discovers some surprising news. Elsewhere, Cruz (Joe Minoso) and Brett's (Kara Killmer) relationship comes to a crucial juncture, while Otis (Yuri Sardarov) develops some unexpected feelings.

It's all hands on deck when Firehouse 51 races to the scene of a deadly chemical leak inside an industrial building. With squad and truck tested like never before, scores of workers are rescued but many are experiencing respiratory distress. This prompts truck 81, squad 3 and ambulance 61 to spring into action to transport the victims to nearby Chicago Med. The situation takes a turn from bad to worse in the midst of the chaos when a "patient" planted inside the hospital goes on a suicide mission armed with a grenade and claiming to be the carrier of a deadly airborne disease. Trying to stop the madman from engaging the explosive device, a member of the firehouse team is severely wounded in the blast and left to face life-threatening injuries. With no other choice, Chicago Med is forced into lockdown until doctors and the Hazmat team can determine the severity of the airborne virus.

Truck and squad are called to the scene of a car crash that has Mills (Charlie Barnett) desperately working to save the life of a driver seriously injured in the wreck. Meanwhile, Casey (Jesse Spencer) has some doubts about Jack Nesbitt (guest star Eric Mabius), whose strip club he is remodeling on the side. Elsewhere, Hermann (David Eigenberg), Otis (Yuri Sardarov), Cruz (Joe Minoso) and Chaplain Orlovsky (guest star Gordon Clapp) help get their team ready for the peewee hockey championship, but Herrmann might prove more of an obstacle than the other team.

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 prompts Sgt. Benson (Mariska Hargitay) to come in from New York to assist with the investigation in which she is all too familiar. Meanwhile, doubts among the squad towards one of their own causes Severide (Taylor Kinney) to lay down the law and Dawson (Monica Raymund) puts her life on the line during a call.

At Sgt. Voight's (guest star Jason Beghe) urging, a determined Lt. Casey (Jesse Spencer) agrees to go undercover in an effort to provide proof of Jack Nesbitt's (guest star Eric Mabius) shady dealings. Meanwhile, Otis (Yuri Sardarov) and Severide (Taylor Kinney) continue to disagree about the integrity of Scott Rice (guest star Warren Christie), causing tensions to flare between members of truck and squad. Meanwhile, Herrmann (David Eigneberg) helps out a fellow member of the firehouse.

Lt. Casey (Jesse Spencer) puts his life on the line and digs deeper into the shady dealings of Jack Nesbitt (guest star Eric Mabius). With members of truck and squad at odds over Rice's (guest star Warren Christie) actions in the field, Chief Boden (Eamonn Walker) is left to figure out how to create unity in a divided house, while Severide (Taylor Kinney) 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 (Joe Minoso) to risk everything to save their own. Elsewhere, Dawson (Monica Raymund) gets some life-changing news.