Chance Kelly

When the FBI takes over the firehouse for an undercover mission, Casey and Severide volunteer to assist with the investigation. Meanwhile, Kidd attempts to help Severide come to terms with recent developments he has been managing.

Dangerously close to exhaustion, Carrie continues her hunt for Nazir, her suspicion turning to inside the Agency itself. Roya reveals her true colors under interrogation, as Saul finds himself fighting for his career under the most unexpected circumstances. Meanwhile, the Brody family struggles to maintain anything close to sanity in their high-rise fishbowl.

A young, interracial couple is found shot and killed inside their car. Detectives are ready to chalk the case up to a murder-suicide, but Megan finds evidence on the bodies that sends the case in an entirely different and shocking direction.

After new information comes to light, Carrie and Quinn pursue a key suspect in the Langley bombing. Saul deals with political backlash while Fara discovers the toll an intelligence job can take. Meanwhile, the Brody family gets startling news.

Danny promises a child that he'll open a cold case, the death of his firefighter father. Meanwhile, Jamie saves a baby from a burning building but worries that his new found fame as a hero in the press jeopardises his job.