Chicago Fire

Shakeups stir things up at Firehouse 51 on the Season Four premiere.

Firehouse 51 comes under scrutiny from Internal Afairs as turmoil from outside and in threatens the whole crew.

Boden's job is on the line as the search continues to uncover evidence that would clear him and the firehouse of any wrongdoing.

Members of Firehouse 51 band together in a time of need.

Friction from the brass above causes problems for everyone at Firehouse 51.

Severide and Patterson's differences reach an all-time high, and a visitor from Cruz's past comes back.

Chief Boden finds himself in the middle of a fiasco concerning a female neighbor, who he believes is setting him up.

Chief Boden is in over his head and Captain Patterson confronts him about his ability to lead the firehouse.

Members of Firehouse 51 are less than thrilled when Captain Patterson (guest star Brian White) steps in as replacement for Chief Boden (Eamonn Walker) while he deals with clearing his good name.

The Firehouse is shocked to discover that one of their own becomes the surprising victim of a stabbing, and an attempted suicide raises some questions - a three-part story arc crosses over into "Chicago Med" and concludes the following night on "Chicago P.D."

A tornado bears down on Chicago and the whole city braces for the worst.

A tormented Herrmann is forced to make a difficult decision, and Casey does his best to keep a shelter open that's housing recent tornado victims.

A wave of threats hits Chicago and Firehouse 51 finds itself in the middle of a dire situation.

Severide attempts to help Chili with her recent struggles and Borelli steps into the ring to represent Firehouse 51.

A suspicious call to a neighboring firehouse leaves some unanswered questions among the ranks of Firehouse 51.

Casey's run for alderman hits a snag that could derail his grand plans.

Severide and Cruz discover a baby's body that may be linked to an unsolved case.

An unsuspecting Brett is left fearing for her life following a call that takes a bad turn.

Casey tries to utilize his political influence to remedy a situation and Otis uncovers something that has him fearing for the worst.

Severide is forced into a delicate situation and Casey receives a surprise in the mail.

Dawson puts her life on the line to save a young boy and Otis fears for the worst.

Firehouse 51 responds to a harrowing building collapse that leaves lives on the line.

Dawson looks to make a major change and lives are in jeopardy in the Season Four finale.