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

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. ...

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 f ...

As per his duties as Alderman Casey visits a warehouse and while there, there's an accident wherein chemicals get spilled all over the place and a toxic gas covers the pl ...

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

While Gabby and Sylvie go on a call, Gabby who is driving hits a man. Later the man's son files a suit. Casey and Severide continue to butt heads over the fire at Darrin ...

When they go on a call, Matt tries to save a boy. But later the boy dies. Gabby and Antonio's parents are celebrating their wedding anniversary and Sylvie is dreading goi ...

Casey and Dawson are informed that they can adopt Louie if they want to. Casey notices a man following them. Severide decides to make some changes in his life. And Jeff C ...

After being approached by a man claiming to be Louie's father, Casey and Dawson explore their options. The team finds a discarded ping pong table and being it to the stat ...

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 ...

Casey and Dawson are reeling from Louie's departure. Casey takes it out on everyone at the station. When Dawson goes on a call about a girl who's on a school trip who col ...

The team is on high alert when a previous incident during a fire call leaves a dangerous man on the loose with a vendetta to target Lt. Casey and Firehouse 51, and prompt ...

When truck and squad are summoned to the scene of a dangerous accident, Chief Boden makes a split-second decision that overrides Chief Anderson, the incident commander wh ...

After exercising his disdain and authority over Chief Boden, Chief Anderson reassigns members of 51 to various houses around town, citing the need for improvement. The ra ...

Truck and squad are called to aid in a massive all-city response when an old, ill-equipped factory-turned live/work space quickly turns into a firestorm, trapping countle ...

Firehouse 51 is taken over by local gangsters. ...

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, ...

Casey discovers a new crack house on the block that is harboring a female junkie and goes to extreme measures to remedy the situation. Dawson and Brett get assigned a new ...

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

Casey takes drastic measures to help Kannell. ...

Cruz finds himself in a bad spot when an off-duty incident begins to unravel, prompting Mouch to step in and offer help in hopes of avoiding serious consequences from the ...

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 retire ...