Anxious to get his hands on some Demerol, a frustrated patient pulls a gun in the ER waiting room and threatens dire consequences if he isn't serviced immediately. After this crisis passes, an outraged Carter (Noah Wyle) threatens a staff walkout unless efforts are made to step up security at County General. Meanwhile, Abby's (Maura Tierney) brother Eric (Tom Everett Scott), an Air Force traffic controller, drops in for a visit en route to his new assignment in Omaha. ~ Hal Erickson, Rovi