Ricardo Gutierrez

Antonio and his sister talk to Elliot about the fire that killed Shay, Lindsay has second thoughts about the task force, and Platt's sunny new demeanour results in curiosity.

The team works with a visiting detective to put an end to a gang's brutal tactics, however, Antonio learns that the detective has a hidden motive for being in Chicago.

Mayor Tom Kane finds out he has a serious medical condition and tries to focus on the upcoming gubernatorial primary.

Kane and his camp battle with the media to dominate the situation when long-buried information about the disposal of toxic waste near the airport comes to the surface via a mysterious blogger.

As Zajac's campaign gathers momentum, Kane must adjust to the realities of living with his medical condition and how the disease will progress.

As his political image hits an all-time low, Kane takes a brief, unannounced break from City Hall to ask an old acquaintance for a favour.