Charin Alvarez

The pressure on Firehouse 51 is at an all-time high as the internal affairs investigation into the handling of a recent fire picks up steam. Just when it appears that game-changing evidence comes to light that would serve to bail out Chief Boden (Eamonn Walker), new twists emerge that put his head right back on the chopping block. Brett (Kara Killmer) and Chili (Dora Madison) respond to a routine call and quickly find themselves in a life and death situation to help aid a stabbing victim who is bleeding out. Meanwhile, a stuck elevator summons the house to a high-rise hotel that tests everyone's mettle and candidate Jimmy Borrelli (guest star Steven R. McQueen) is conflicted when his older brother Danny (guest star Andy Ahrens) looks to get him transferred to a different house. Jesse Spencer, Taylor Kinney, Monica Raymund, David Eigenberg, Yuri Sardarov, Joe Minoso and Christian Stolte also star. Nick Gehlfuss, Oliver Platt, Brian Geraghty, Brian White, Rachel Nichols and Fredric Lehne also guest star.

Election Day. The race is close, and while the candidates campaign, Kane and Stone must do their part to turn the gears of the political machine. Emma's world is turned upside-down while Meredith must go to great lengths to prove her allegiance to Kane.

In the series premiere episode, Teresa Colvin, the city’s first female superintendent, lobbies for a city corruption task force to investigate Alderman Ronin Gibbons, a building-magnate-turned-politician. Meanwhile, Colvin’s ex-partner and larger-than-life veteran of the Chicago Police Department, Jarek Wysocki, investigates a suspicious murder in Grant Park alongside his new partner Caleb Evers. Also in Jarek’s charge are his niece, Vonda Wysocki; her hotshot partner, Isaac Joiner; and Liam Hennessey, an Irish thug who blends in with the gritty world of local crime. Together, these cops stop at nothing to navigate the Windy City’s underbelly to fight crime and bring down Alderman Gibbons’ empire of corruption.