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.

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

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

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.

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.

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.

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.

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.

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