A 9/11 hero is treated, but an unforeseen medical problem arises. Meanwhile, Sarah contemplates which hospital to select for her residency; Dr. Choi cares for an injured teen hockey player…

The grand opening of Chicago Med’s emergency department is interrupted by victims of an elevated train crash, pushing the staff to their limits.

When a P.D. informant is murdered, the team digs in to track down the perpetrator only to learn a shocking truth. Voight and Ruzek strategize to help Burgess.

Tasked with shadowing a crisis prevention team, Upton finds her approach to policing at odds with the team’s mental health clinician. Voight stands by Upton as she continues to struggle…