Mia Park

Doctors and nurses deal with a staff member's suicide; Choi and Halstead face off over how to treat a patient who is experiencing stroke symptoms; Manning treats a boy who fell into the river; Rhodes examines the man who saved Dr Manning's patient.

Dr Manning struggles to treat a comatose woman who is unexpectedly pregnant. Dr Reese is contacted by a troubled teen in a psychiatric facility.

Rhodes fights to save a mother who's determined to help her daughter beat cancer. Dr Charles asks Sarah to conduct his daughter's psych evaluation.

Doctors must diagnose patients without the aid of technology after a hacker shuts down the hospital computer system. Goodwin gets a visit from her ex-husband Bert and his new girlfriend and Choi and Noah have to remove a bullet from a gunshot victim.

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.

The Firehouse 51 crew have their work cut out for them when a tornado hits the city. Also, Brett must report Chilli after she makes a big mistake.