Episode 1 | The Hose or the Animal

Severide and Stella are on the lookout for her unstable ex.

Episode 2 | A Real Wake-Up Call

Members of 51 end up in a dangerous situation while responding to an auto accident and Stella must make a serious decision about her ex.

Episode 3 | Scorched Earth

Casey gets help from Susan Weller for an urgent personal matter; Severide is given an opportunity to travel with Travis Brenner; Stella saves a street kid from a tunnel fire.

Episode 4 | Nobody Else Is Dying Today

Casey is forced to take extreme measures when a forklift accidentally pierces a tank of acid, causing it to spill and putting a father and daughter in danger.

Episode 5 | I Held Her Hand

Casey and Severide disagree on a potential arson case when the squad fails to save a woman from her burning house.

Episode 6 | That Day

Dawson hits a pedestrian while responding to a call. Casey and Severide continue to investigate an arson case while Chief Boden is in New York to attend an important function.

Episode 7 | Lift Each Other

Gabriela and Antonio's parents come to Chicago for their anniversary, while Chief Boden discovers a secret about his stepson.

Episode 8 | One Hundred

Casey and Dawson apply for permanent adoption of Louie. Jeff Clarke gives Severide an interesting proposition. Otis convinces Herrmann to throw a bash celebrating the 100th anniversary of Molly's, but there are complications.

Episode 9 | Some Make It, Some Don't

Dawson and Casey meet Louie's biological father. In other events, Severide falls back into old habits as he tries to help Anna with a bone marrow procedure, and Brett opens up to Dawson.

Episode 10 | The People We Meet

Louie's father throws a wrench into Casey and Dawson's family plans. Severide agrees to a bone marrow donation but a work accident throws everything into flux. Casey and Dawson try to find harmony at home. Meanwhile, Otis and Mouc...

Episode 11 | Who Lives and Who Dies

Dawson tries to keep her emotions in check during an ambo run involving a pregnant teenager, while Casey is forced to make a split-second decision regarding two victims in need of assistance and deal with the repercussions.

Episode 12 | An Agent of the Machine

A dangerous man is after Casey for an incident during a fire call.

Episode 13 | Trading in Scuttlebutt

A superior comes after Boden for making a split-second decision in an accident that overrides him.

Episode 14 | Purgatory

Members of Firehouse 51 are split up and reassigned to various houses in Chicago by Chief Anderson.

Episode 15 | Deathtrap

Firehouse 51 responds to the scene of a blaze that puts many lives in danger, including someone related to a Chicago police officer.

Episode 16 | Telling Her Goodbye

Firehouse 51 is taken over by local gangsters.

Episode 17 | Babies and Fools

When similar car accidents uncover the fact that someone may be targeting innocent people, a determined Dawson takes matters into her own hands to help push things along, meanwhile Casey tends to his Alderman's duties.

Episode 18 | Take a Knee

Dawson and Brett have a new trainee assigned for their shift; Severide's father pays him an unexpected visit.

Episode 19 | Carry Their Legacy

Casey is reunited with an old colleague when the squad's rig breaks down in the field.

Episode 20 | Carry Me

Casey takes drastic measures to help Kannell.

Episode 21 | Sixty Days

Cruz faces a possible suspension from the fire department for an off-duty incident.

Episode 22 | My Miracle

A dangerous warehouse fire puts truck and squad at risk. Tensions rise for Dawson and Casey as Dawson's father overstays his welcome at their home. Mouch considers retirement.