Michael Ironside makes his first appearance as new ER chief Dr. William Swift, who immediately sets the staff on its ear with his bizarre management style and intense perfectionism. Meanwhile, the rivalry between med student Carter (Noah Wyle) and Deb (Ming-Na) reaches a new height of absurdity. Greene (Anthony Edwards) has a lot of trouble shaking his guilty feelings after the death of his pregnant patient Jodi O'Brien. And Benton (Eriq La Salle) must face the realization that his mother's days are numbered. ~ Hal Erickson, Rovi