They are sending someone else to make sure they have electricity. Sexton suspect that their patient might have accidentally have overdosed on fentanyl. Benson to come in from New York to assist with the investigation in which she is all too familiar. Meanwhile, Boden and his wife go to a doctor's appointment about his upcoming child. A dangerous warehouse blaze quickly gets out of control and threatens members of firehouse 51.
Daniel Charles uncovers troubling information concerning Dr. Brett is able to bring him back, with a strong pulse. Elsewhere, Brett's ex-fiancé comes to town to win her back. Later, Mills accompanies Newhouse on a task for his side gig to retrieve a stolen dog. Elsewhere, Casey continues to go undercover to bust the strip club owner for human trafficking.
Robin Charles is released from a rehabilitation facility, but Dr. Stella admits that Severide is her blindspot; when it comes to him she sort of goes off the rails. The Number of Rats 2 aired on Chicago P. An unwelcome familiar face comes to Firehouse 51 to fill in a void in Squad 3. She is sure someone is looking for him, asking if they can call them; Matt goes to get the Chief as Sylvie stays with him. But from the relentless pressure of saving lives, an extended family is forged.
Meanwhile, the firehouse bands together when Chaplain Orlovsky is the victim of a bad car accident. They also learn that John never came downstairs. Led by Chief Wallace Boden, Matthew Casey, Kelly Severide, Sylvie Brett and the others know—when it's go time, Firehouse 51 lays it all on the line for each other. As these heroes forge headfirst into danger, the choices they make can mean the difference between life and death. Chief Boden must figure out how to create unity in a divided house, while Severide comes to question his own judgment. But let's face it, they probably don't know either.
Otis tells John if he is a firefighter from Detroit he is the Dali Lama. Herrmann asks the rest of the Molly investors to come up with some new ideas to turn the business around. Halstead confront their feelings for one another once and for all. He says his name is Logan Miller, she tells him it is nice to hear his voice. Reese makes a reckless decision with a patient who wants to be on a psychiatric hold because of homicidal thoughts. Casey puts his life on the line and digs deeper into the shady dealings of Jack Nesbitt. Reese's estranged father, who is admitted to the hospital as a patient.
Meanwhile, Casey has some doubts about Jack Nesbitt, whose strip club he is remodeling on the side. Tuesday viciously barks at John but Ritter takes him to the room. It is a double homicide as Herrmann reveals to everyone the boy hid in the rig from their last call as Ritter says it could have to do with the homicide. Meanwhile, Shay's sister comes to Firehouse 51 and goes on ride alongs with the house. Eventually, Casey finds him at his cabin where he admits he's reluctant to return. Choi brings his sister to meet April at a.
While treating an elderly mother, Dr. Further tests show that the appendix procedure in her teens was actually to , a secret her mother kept from her for all these years. Mills is worried about Newhouse and his off-duty activities. 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. On November 22, it was announced that would be joining the cast in a recurring role as Emily Choi, Ethan's adopted sister. This episode serves as the backdoor pilot for. Brett asks Boden to take 61 out of service.
Thanks to Cruz checking in on them, Truck 81 and Squad 3 are eventually able to rescue them. 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. Later, the boy is taken away from his mother for a past charge of neglect and abuse. 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. 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.
Latham to try and reconcile the tension between him and Dr. Reese returns from her suspension and is immediately put to the test with a patient with a bipolar disorder. Brett has a totally different view on dating, but Emily thinks if they find someone they really click with the rules go out the window. Christopher Herrmann David Eigenberg returns with the truck, asking about the gunfire at the last call, but Herrmann has no idea what he is talking about. Reese scramble to locate the son of a dying patient.