The story of firefighters in Chicago.
Cast: Jesse Spencer, Taylor Kinney, Monica Raymund, Lauren German, Charlie Barnett, Yuri Sardarov, Christian Stolte, Eamonn Walker, Anne Lockhart, David Eigenberg, Joe Minoso, Randy Flagler, Don Kress, William Smillie, Steve Piper, Teri Reeves, Mo Gallini, Nicole Forester, Kathleen Quinlan, Anita Nicole Brown
Severide puts his job on the line to help out one of their own. Kidd navigates Natalie’s complicated relationship with her sister. Herrmann prepares to take the Chief test.
Kidd strengthens her bond with Natalie during a road trip. Severide investigates a car fire and uncovers surprising evidence. Violet receives a career opportunity after being featured in a local newspaper.
With the crew stretched thin, a performance efficiency expert evaluates Firehouse 51. Kidd and Severide bond with the mother of the baby they hope to adopt.
Severide investigates an old house fire from 10 years back in which Kidd had responded. Carver and Violet search for a mystery medic who abandoned a victim. Novak looks for a roommate.
Boden returns on the orders of Commissioner Grissom, who has tasked him with analyzing a burned-out house that collapsed with a firefighter inside.
Kidd connects with a troubled teen interested in Girls on Fire. Cruz, Capp and Tony eagerly wait to try out Squad's new saw. Violet and Novak are stumped by a bodybuilder who passed out at the gym.
In the face of adversity, Pascal searches for justice. Violet struggles to write a letter to Carver. Damon returns to the floater pool hoping to secure a permanent spot at 51.
Kidd and Severide eagerly await big news. Pascal searches for the perfect anniversary gift.
A surprise visitor from Novak's past joins Ambo for a late-night ride-along. Herrmann faces a mountain of Chief-level training records and incident reports. Violet catches Carver in a lie.
After a daring rescue at an adventure park, Kidd asks Severide to create a ropes course for Girls on Fire. Violet's former nemesis returns, pleading for her help. Herrmann creates a signature cocktail for Molly's.
Herrmann investigates the rise in missing fire hydrants and teams up with Kylie to track them down. Kidd's cousin comes to town, revealing surprising family history. Violet and Novak treat the victim of a birthday cake smash gone awry.
Chicago's first responders unite in the wake of a catastrophic gas explosion and fire that threaten a city government building. Herrmann reluctantly shadows Pascal while Violet, Novak and Dr. Frost take charge of triage efforts on site. The crossover continues on Chicago Med S10E11 In the Trenches (II) and Chicago P.D. S12E11 In the Trenches (III).
The team responds to a crisis at a community center. Severide is forced to investigate one of his own squad members. Kidd helps a teacher going through a post-incident spin-out.
Cruz's past comes back to haunt him. Severide prepares to teach an arson class at the academy. Mouch searches for a victim's next of kin.
Herrmann and Mouch study for officer exams. Cruz gets an ominous sign. Carver cares for a dog whose owner was hurt during an emergency call.
Pascal and Severide revisit a storage facility fire searching for new evidence. Cruz aids Mouch's exam preparation. Novak proposes a whole blood program to Chief Robinson.
Severide gets wrapped up in an Illinois State Police investigation after discovering illegal guns on a call; a bird harasses Mouch on the apparatus floor; Kidd keeps an eye on Carver as his attitude worsens.
Kidd and Severide investigate a trucking company responsible for a string of accidents; Herrmann recruits Kylie to help get new radios; Firehouse 51 celebrates Violet's birthday; Carver's allegiances are torn.
Violet risks her job to deliver a baby on a tragic call; Mouch, Capp and Tony help Cruz track down Javi's stolen bike; Damon's departure weighs on Severide.
Severide and Van Meter investigate a fire at a family-owned restaurant. Pascal questions Kidd's leadership.
After Damon disobeys Kidd's orders in a call, he turns to Severide to protect him. Hermann searches for the perfect scent to spice things up with Cindy.
A new chief shakes things up at Firehouse 51. Violet and Novak work to uncover the truth behind a car crash. Cruz keeps a watchful eye on Severide and Damon's growing bond.