Roland Buck III

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 begins his cardiothoracic surgery fellowship, but gets off on the wrong foot with his new boss, Dr Latham. Meanwhile, Dr Choi begins his life as chief resident, and Sarah is caught off-guard by Dr Charles.

After a neighbour is stabbed, Dr Choi enlists the help of April to figure out the real cause of the incident. Meanwhile, Noah misdiagnoses a patient, and Dr Reese's estranged father comes to Dr Charles, as a patient, without her knowledge.

A car crash at the Chicago Marathon leaves victims in critical condition, and April and her medical resident brother must perform an operation in the field. An 8-year-old girl experiences sudden hearing loss, and Dr Choi treats a malnourished woman.

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

Goodwin runs into an old flame. Meanwhile, Dr Halstead is seduced by a business offer and a young woman undergoes treatment for a heart infection.