Abby and Moretti clash over how best to evaluate the interns. Morris and Pratt take over the lounge to do some last minute studying for the Boards. Neela asks them to assist her intern with a personal matter. Joshua comes back to the hospital in respiratory failure and Gates treats him. Sam is puzzled by a teen patient's changing symptoms and abrasive behavior. Moretti's son shows up for an unexpected visit. A new attending arrives at the ER. Abby continues to wrestle with her alcohol problem and it's consequences.