A girl’s rapidly changing symptoms has everyone perplexed; a 19-year-old tough guy arrives in severe distress; Dr. Halstead deals with a difficult case, while Dr. Rhodes is followed by a camera crew shooting a promotional video.
Who Lives and Who Dies
Dawson struggles to control her emotions during an ambulance ride with a pregnant teen; the firefighters rush to a building fire; Casey must make a quick decision when two victims both need life-saving assistance; Severide shares a bond with Anna.
Maggie must face her past when her arresting officer arrives at the hospital with a serious injury. Also, a heart transplant patient gets into a car crash, complicating her surgery; Dr. Halstead treats an uncooperative horse jockey; Manning and Halstead deal with a patient’s death.
The investigation into the murder of a sex offender leads to a private police force that may be involved in illegal activities. In other events, Halstead has Jimmy’s DNA tested to see if he actually is Lindsay’s father.
The People We Meet
Severide agrees to a bone marrow donation; Casey and Dawson attempt to find harmony at home; Otis and Mouch plan to create a PSA to encourage people to join the Chicago Fire Department.
Don’t Read the News
The team links a string of murders to a serial killer; Lindsay decides to meet her biological father; and, when Ruzek takes an undercover assignment, Voight welcomes a new member to the team.
Some Make It, Some Don’t
Dawson and Casey face legal issues as they try to retain legal guardianship of Louie; Severide continues to look for a bone marrow procedure to help Anna; Brett opens up to Dawson.
A War Zone
The body of a college student is found with a backpack full of a drug linked to deadly overdoses around the city; Tay finds a bloodied child with a dark story about his parents; Mouse looks to re-enlist in the army.