Chicago Fire

Sacred Ground. In the season premiere, the mattress factory fire spirals out of control. Truck and squad lay it on the line in hopes of getting the trapped victims out alive.

A Real Shot In The Arm. Lt. Casey struggles to get Chief Boden to sign off on an energetic new recruit. Against her better judgment, Foster extends an olive branch to her irritating new medic.

Badlands. Brett and Foster question the suspicious circumstances surrounding a brutal attack at a juvenile detention center, which leaves them searching for the truth.

Infection Part 1. In the first part of a three show crossover event, a rare but deadly bacteria takes its toll on numerous victims around the city.

Buckle Up. Kidd must prove herself at the National Firefighter Leadership Conference while the rest of Firehouse 51 is called to two eerily similar car wrecks.

What Went Wrong. Cruz and Severide suspect foul play when a fire started by an elderly woman turns deadly. Kidd, Foster and Brett create a women's only lounge. Firehouse 51 celebrates some good news.

Welcome To Crazytown. Severide must make a tough decision about the future of his career at Firehouse 51. Herrmann deals with the consequences of his temper after a run-in with a Chicago police officer. Cruz is excited to demonstrate the Slamigan at the Firefighting Expo. Commissioner Grissom returns.

Seeing Is Believing. Severide begins his assignment at the Office of Fire Investigation and gets off on the wrong foot when, despite his orders, he reopens an old case.

Best Friend Magic. An unexpected visit throws Casey for a loop. Severide sets out to exonerate a wrongly convicted arsonist. Kidd pays the price for burning the candle at both ends.

Hold Our Ground. Redrawn boundaries cause overlap with an adjacent station and problems quickly arise for Firehouse 51. Brett and Foster find themselves at odds. Mouch discovers a mysterious letter.

Where We End Up. A pest control issue forces the 51 team to bunk with Firehouse 20. Casey clashes with Cap. Delaney while Foster, Kidd and Brett fear Cap. Leone has it out for them. Boden mulls a procedural overhaul.

Then Nick Porter Happened. Series of false alarms at a school hinders the firehouse's ability to respond to legitimate emergency calls. Kidd looks to surprise Severide on his birthday. Cruz and Brett rent out their extra room.

A Chicago Welcome. The surprising arrival of a new fire truck brings both joy and chaos. Boden and Severide are asked to make peace with an old foe. Brett receives family news while Foster plans a party with friends.

Shut It Down. A series of mysterious gas leaks has Firehouse 51 puzzled. Brett's conflicted when her birth mother starts tracking her down. Severide misunderstands his role as Cruz s best man.

Off The Grid. In a two show crossover event with Chicago P.D., a series of teen opioid overdoses sees Severide partner with Sean Roman, but begins to suspect there's more to the story than Roman is telling him.

The Tendency Of A Drowing Victim. Boden is on edge after starting a new fad diet. Casey and Severide disagree on a call. Brett's birth mother shares life altering news. A familiar face has a proposition for Herrmann.

Protect A Child. Things get personal for Casey and Gallo in the aftermath of a house fire involving a mother and her young son. Herrmann campaigns for more respect. Kidd has an idea for giving back to her community.

I'll Cover You. Severide teams up with OFI when a motel fire turns suspicious. Firehouse 51 become sleuths following a Reddit post involving one of their own. Brett continues to get invested in her birth mother.

Light Things Up. Tension builds when a group of rabble rousers attempt to lock down the firehouse. Brett is faced with a big decision. Gallo and Ritter attempt to launch Firehouse 51 into the social media age.

51's Original Bell. When one of 51's own gets injured on a call, Lt Severide becomes obsessed with helping out. Foster contemplates a big decision. Kidd is concerned for one of her high school trainees.