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.

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.

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.