Alex Weisman

A mass shooting at a cinema inundates the hospital with gunshot victims, including the shooter. Dr Rhodes faces a crisis of conscience.

Rhodes and Zanetti race to save a member of Firehouse 51, April's brother struggles during his first day at the hospital, and a woman saved from a burning building leads to a bigger mystery.

Dr Rhodes tends to two injured aeroplane stowaways, but their treatment becomes complicated when the Department of Homeland Security arrives.

The shooting of a child in their neighbourhood forces Cruz and his brother to think about the gang, Isabella gets Mills to dress up for a gala, Casey feels sad he will be seeing Dawson less, and Shay gets in deeper with Devon.

Severide sticks his neck out to help a drug addict and Jones questions her career choice as her dad's meddling takes its toll.

Dr Halstead decides to resuscitate a patient with stage four cancer, despite the family's objections. The nurses try to improve patient satisfaction.