Dr. Carter, I Presume

Carter begins the first day of his internship with the difficult task of filling in for Benton as the ER surgery consult.  Jeanie makes difficult decision regarding her HIV-positive status; Peter's test comes back negative.  Weaver implements an incoherent system for tracking patients.  The ER staff attends a Fourth of July softball game, where Carol runs into Shep and his new girlfriend.  Peter runs into an old friend, Carla Reese, at Jackie and Walt's barbecue.