Sammy A. Publes

Teresa Colvin, the city's first female superintendent, petitions for a corruption task force to investigate an entrepreneur-turned-politician; Colvin's ex-partner, Jarek, investigates a suspicious murder with his new partner, Caleb.

A failed rescue attempt deeply affects the men and women of Firehouse 51; Dawson and Shay deal with a drug-user's erratic behaviour during a call, and the team upset local drug dealers.

Commander Perry informs the team that Pulpo has been released to assist with a case. Meanwhile, Ruzek struggles with tough news, and details of Lindsay's past come back to haunt her.

Intelligence tries to find justice for Olinsky after he gets stabbed in prison; Antonio's loyalties are stretched; Woods decides to try and bring Voight down for good.

While providing security for a medicinal marijuana dispensary, Halstead and a colleague are targeted by a gang who want to get their hands on the profits.

Tia's campaign for alderman is in jeopardy after it is revealed that Jira is her daughter and she gave her up for adoption. Meanwhile, to help indict Paul, Daniel tries to find the anonymous sender of the security tape.