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As a hurricane bears down on Miami, things are equally stormy in the Maguire ER, where a serious allegation has opened rifts between the residents.

The worsening storm overwhelms the ER, forcing Danny to make tough choices. Tom must rise to the occasion when someone close to him is injured.

As the hospital's backup generators run low, Dr. Cruz worries for Vero's safety. Sophie and Camila risk it all to save a patient in danger.

With the ER at capacity post-storm, Danny struggles to balance a full caseload and the arrival of a new attending — who has a history with Xander.

A charismatic sheriff's deputy sets his sights on Danny. A young patient's demanding parents make things hard for Harper. Sophie faces a moral dilemma.

A hometown visit to their difficult father reopens fault lines between Danny and Harper. Tom and Dr. Soriano's day off takes an unexpected turn.

Danny and Sam undergo Dr. Cruz's scrutiny as she prepares to choose next year's chief resident. Camila looks for clues to a girl's mysterious illness.

As they await an interview with HR, Danny and Xander reckon with their painful past. A crisis brings Tom's divided loyalties to light.

A nightclub fire floods the ER with patients. With Danny's career hanging in the balance, Dr. Cruz must make a difficult decision.

Xander comes clean about what really happened at his former hospital. A new academic year brings a new chief resident — and new challenges in the ER.