While the names may change, the task remains the same: saving lives. In Season 9 of the landmark drama, John Carter is now the Chief Resident, and his romantic attraction to Abby starts to turn serious — until Abby’s psychiatrically challenged brother (Tom Everett Scott) shows up. Meanwhile, Kovac’s wild ways begin to affect his job performance, leading him to examine his tragic life and make a change. Opting for an assignment in the dangerous war-torn Congo, Carter and Kovac experience real trauma firsthand. With Corday widowed, Susan Lewis gets married (to guest star Donal Logue), Weaver gets promoted, and Dr. Romano replaces her — but it’s going to cost him an arm and a . . . well, just an arm. Between a deadly quarantine, a staff walkout, a 200th episode and an episode told backwards, ER’s the right prescription for drama. With guest stars Don Cheadle, Ed Asner, Sally Field, and more, the prognosis looks good for Season 9. Watch now on iTunes.