Having all but forced its CBS medical-show competition Chicago Hope off the Thursday-night schedule, NBC’s ER reigned supreme as the series entered its second season. Having wrongly assumed that he would leave Chicago County after his third year of med school, John Carter (Noah Wyle) remains on staff as a surgical sub-intern, and by and by is given a promotion; later on, he follows the example of his sexually supercharged colleagues by getting involved in a romantic triangle. Carter's short-tempered supervisor, Dr. Benton (Eriq La Salle), likewise enters into a relationship, with divorcée Jeanie Boulet (Gloria Reuben) — who may or may not be entirely free of her troublesome ex, Al (Michael Beach). Left standing at altar by her fiancée at the end of season one, Head Nurse Carol Hathaway (Julianna Margulies) falls for Ray "Shep" Shepard (Ron Eldard), a rather reckless paramedic. And Dr. Susan Lewis (Sherry Stringfield) has become quite comfortable caring for her irresponsible sister Chloe's baby, Suzy -- until Chloe (Kathleen Wilhoite) pops up out of nowhere to demand custody. Season two marks the introduction of Laura Innes as Dr. Kerry Weaver, whose brusque, fingernails-on-the-blackboard attitude gets on everyone's nerves. In other developments, Dr. Ross (George Clooney), facing dismissal because of his maverick behavior, redeems himself by saving a boy trapped in a culvert during a torrential downpour; Shep goes over the edge when his paramedic partner is killed in a fire; and, in the season-ending cliffhanger, Benton discovers that Jeanie's former husband, Al, has infected her with the HIV virus. ~ Hal Erickson, Rovi