Mia Park

Lt Casey must work with Voight and the Intelligence Unit, Shay grows increasingly excited about the prospect of motherhood, and everyone comes together to support the opening of Molly's.

As the city is thrown into chaos by freezing temperatures, Sylvie gets trapped in a life or death situation. Plus, an abandoned baby is found at the Firehouse.

Choi and April consider calling social services when they suspect that a patient is being abused, while Manning and Halstead have a disagreement.

The shooting of Dr Charles moves to the courtroom. Dr Halsted and Dr Manning work on a heart-wrenching case.

Dr Manning goes to extreme measures to help a fearful pregnant woman and Dr Choi and April try to strike a balance at work. Also, Dr Charles and Dr Reese continue to disagree about their patients.

Dr Manning investigates a young boy's background after the child is admitted with a broken wrist. Dr Choi tries to deal with an erratic patient.