Lorena Diaz

Dr Choi treats a teenage mother who abandoned her newborn baby in an alley. The nurses surprise Dr Manning with a baby shower.

Charles grows increasingly suspicious of a colleague's intentions; Lenox crosses a line to protect a patient; Asher and Archer treat a soon-to-be father battling cancer.

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.

When the E.D. is flooded with patients from a crash, the entire team is pulled in to help; Charles can't shake the feeling that he knows the new E.D. attending; Archer has second thoughts on the eve of his kidney transplant.

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.

Casey and Dawson find themselves in the middle of a potential political mess, as 51 responds to a dangerous call.