When dozens of critical patients flood the ER, Robby and his team struggle to keep up amid quickly diminished supplies.

As the night shift begins, Robby refuses to give up on a mass casualty victim. Samira and Santos each attempt risky moves.

Al-Hashimi reveals details from her medical history, forcing Robby to face an ethical dilemma as he prepares to leave for his sabbatical.

Robby resorts to unorthodox methods to convince a father to allow treatment for his son. Later, Whitaker tracks down a missing patient.

After his bike takes a hit in the ambulance bay, Robby levels with Duke. A spinal cord injury forces Langdon to attempt a risky procedure.

As the team deals with a loss, Al-Hashimi and Robby continue to clash over the best course of treatment for a patient showing signs of malnutrition.

While Robby attends to an elderly patient with ties to Pittsburgh's history, other members of the team attempt to resuscitate a young drowning victim.

While Robby struggles with a loss, Abbott coaches Samira through a risky procedure, and Mel treats a teen with a mysterious rash.

After an incident at a nearby water park, several critical patients are rushed to the Pitt. Later, Al-Hashimi confronts Robby.

While attempting to distract himself from the anniversary of his mentor's death, Dr. Robby introduces a fresh batch of interns to life in the ER.

While Robby handles an ultimatum from the hospital, Mel, Javadi, and Collins each handle unique mother-daughter dynamics.

Santos and Collins each deal with moral quandaries. Samira’s careful approach earns praise from patients – and reproach from Robby.

After examining an influencer with strange symptoms, Samira pushes back against Robby. Santos contends with a patient accused of assault.

Bets are taken on the whereabouts of a stolen ambulance, while Santos learns a hard lesson, and Whitaker helps to tame “The Kraken.”

Samira does her best to keep Whitaker on the right track. A teen overdose sparks conflict in the ER.

With a nearby hospital shuttered on the busiest day of the year, Robby and team must field extra patients, including the victim of a parkour mishap.

Robby helps siblings navigate their elderly father's end of life care. Later, Samira fends off cops targeting a woman with a misunderstood condition.

While nervously awaiting her deposition, King takes a tumble. Al-Hashimi tries to introduce new technology into the ER.