Janet Ulrich Brooks

An airfield emergency triggers a deeper mystery involving a passenger plane, propelling the Intelligence Unit into a high-stakes pursuit of the culprit, all under the sharp eye of the FBI.

Dr Charles is pressured when Dr Choi and Dr Manning disagree with his medical decision regarding a baby born with an addiction to heroin.

Severide returns from Las Vegas with a life-changing secret to share. Plus, the crew make a disturbing discovery at the scene of a fire.

Chicago is bankrupt and a team of receivers pour in to take control of the city. However, losing his mayoral power isn't the biggest danger to Kane, as various enemies are threatening to expose his illness and corruption.

It's the moment of truth for the city of Chicago and the police department. FBI Special Agent Cuyler returns to pay Superintendent Colvin a visit, and Jarek stops at nothing to address family issues that have haunted him for years. When Jarek and Teresa are forced to put everything on the line, the stakes are raised as their case against the kingpin of corruption in Chicago comes to a climactic conclusion.