Danny McCarthy

Danny contemplates retiring until Erin enlists him to help her with a case involving her ex-husband, Jack. Jamie and Eddie go undercover as a couple, and Frank butts heads with the new mayor of New York City, Margaret Dutton.

Danny and Baez are caught in the middle of office politics, while Frank compromises his relationship with the church.

Detective Voight shows up, looking to cash in the favour Dawson owes him, Casey's social life takes on a familiar pattern, Molly prepares for the grand opening of the Dawson bar and Severide faces a threat to his career.

Several members of the media are attacked in a string of bombings. Firehouse 51 helps the team examine the devices before the next attack.

A lavish groundbreaking of the modernised O'Hare terminals cements Kane's legacy. Despite his seemingly bright political future, Kane continues to struggle with his disease.

Kane uses a tragedy in his personal life to further his political agenda. He also tries to heal his fractured inner circle by poaching Mona Fredricks, the senior aide of his nemesis.