Patti Murin

April is injured while treating a difficult patient, as Dr Manning struggles with her past. Dr Rhodes, meanwhile, faces a challenge.

A man who became a hero in 9/11 requires a lung transplant. A hockey player comes in with injuries, and an overbearing father.

Herrmann faces hazing in his new role as lieutenant; Foster suspects a young gymnast's injury is more than meets the eye; Severide is jealous of Kidd's best friend; Casey and Boden turn to PD after treating two victims who have similar injuries.

Dr Choi is affected by the outcome of gang violence; Dr Halstead is encouraged by a patient's cheery disposition; Dr Manning and Rhodes think that two cases of illness could be connected.

Dr Charles and Caroline set some major plans; Ava fights to keep her relationship with Connor; Agent Lee informs Will of news that may put his life in danger.

Dr Charles' epidemiologist daughter arrives to consult on a rare infection; Dr Reese attempts to help a young drug addict.