Kris Wolff

When a fire claims one of their own, there’s plenty of guilt and blame to go around. Lt. Matthew Casey (Jesse Spencer), in charge of the Truck, tries to carry on, but clashes with the brash Lt. Kelly Severide (Taylor Kinney) of the Rescue Squad -- and each blames the other for their fallen team member. Adding to the turmoil, Casey, unbeknownst to his colleagues, is in the midst of a separation from Hallie (Teri Reeves, "Three Rivers"). The firehouse also includes: Battalion Chief Wallace Boden (Eamonn Walker), a fireman’s fireman who is confronted by important personal decisions; paramedics Gabriela Dawson (Monica Raymund) and Leslie Shay (Lauren German), who share a close bond and team together to face some of the most harrowing situations imaginable; Peter Mills (Charlie Barnett), an academy graduate who is the latest generation in a family of firefighters; and Christopher Herrmann (David Eigenberg), a seasoned veteran who loses his home to foreclosure and now must uproot his family to move in with his in-laws.

The team investigates a string of brutal pharmacy robberies and Halsted connects with one of the victims about their Army careers.

Lt. Severide (Taylor Kinney) has his strong ideas on who the serial arsonist is, but first needs to find proof to back up his suspicions. Meanwhile, Lt. Casey (Jesse Spencer) adjusts to his new lifestyle in the wake of recent events and Molly's bar is failing, much to the dismay of owners Hermann (David Eigenberg), Dawson (Monica Raymund) and Otis (Yuri Sardarov). Elsewhere, Dawson goes out on a date with Jay Halstead (guest star Jesse Lee Soffer), one of the bar regulars, and Mouch's (Christian Stolte) campaign trail starts to get on track with the aid of Isabella (guest star Mena Suvari), an old friend of Dawson's.

The record-breaking summer heat and the likelihood of blackouts send the Chicago Police Department into the streets in full force to temper the city’s escalating violence. Alongside her new driver, Superintendent Teresa Colvin finds herself back in the field while Detectives Wysocki and Evers take over an emotional case in which a son witnessed his father’s fatal shooting. Meanwhile, Alderman Gibbons enlists Liam to help keep his constituents cool.