In the opening episode of ER's second season, Carter (Noah Wyle) gets off to a bad start on his first day as new surgical sub-intern by showing up extremely late and woefully unprepared. Also on hand is new third-year student Harper Tracy (Christine Elise), who endures an ordeal by fire thanks to a psychotic patient -- and who catches the eye of the still-unattached Carter. Elsewhere, Greene (Anthony Edwards) ruffles more than a few feathers with his choice of new chief resident: the contentious and highly irritating Kerry Weaver (Laura Innes). With this episode, William H. Macy returns in the role of ER chief Dr. David Morganstern. ~ Hal Erickson, Rovi