Chicago Fire, Chaos Theory

Change is inevitable in this premiere. A new chief shakes things up at Firehouse 51. Violet and Novak work to uncover the truth behind a car crash.

After Damon disobeys Kidd's orders on a call, he turns to Severide to protect him. Herrmann searches for the perfect scent to spice things up with Cindy.

Severide and Van Meter investigate a fire at a family-owned restaurant. Pascal questions Kidd’s leadership.

Violet risks her job to deliver a baby on a tragic call. Mouch, Capp and Tony help Cruz track down Javi’s stolen bike.

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.

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.

Pascal and Severide revisit the storage facility fire in hopes of uncovering new evidence. Cruz helps Mouch take his studying to the next level. Novak prepares a proposal for Chief Robinson.

Herrmann and Mouch prepare to take their officer exams. Cruz receives a chilling omen. Carver takes care of a dog after its owner is injured on a call.

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.

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.

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.

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.

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.

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.

Kidd and Severide eagerly await big news. Pascal searches for the perfect anniversary gift.

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 connects with a troubled teen interested in Girls on Fire. Cruz, Capp and Tony eagerly wait to try Squad's new saw. Violet and Novak are stumped by a bodybuilder who passed out at the gym.

Boden returns on the orders of Commissioner Grissom, who has tasked him with analyzing a burned-out house that collapsed with a firefighter inside.

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.

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.

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 newspaper.

From Emmy-winning producer Dick Wolf (Law & Order) this high-octane drama follows the personal and professional lives of a group of dedicated firefighters in Chicago.