Amy J. Carle

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

Severide comes back to work but isn't his usual self, Mills discovers more information about his father's family and Herrmann asks Molly investors to share ideas that could help turn the business around.

Dr Halstead treats a blast from his past, and Manning and Charles try to treat a young patient who refuses to take medication.

The entire squad are tested when a helicopter crash causes chaos in the city. Amid the devastation, Brett gets cornered by a dangerous man with a gun.

Dr Charles faces a difficult case involving a patient who wants to remove his own arm, while Halstead and Goodwin try to help a grieving widower.

Casey adds to his and Dawson's relationship woes during a wild night out with Severide. Plus, a house fire puts a couple's life in danger.