Two new doctors join the Emergency staff at Chicago's County General Hospital as ER begins its sixth season: Pediatric resident Cleo Finch (Michael Michele) and Croatian émigré Luka Kovac (Goran Visnjic). Getting things off to a lively start, a truck crash through a coffee shop window results in a larger than usual volume of ER patients. Elsewhere, rumors fly that the prickly Dr. Romano (Paul McCrane) will replace the retiring Dr. Anspaugh as chief of staff -- a contingency that Greene (Anthony Edwards) tries to prevent, only to be ruthlessly undercut by the ambitious Weaver (Laura Innes). John Carter (Noah Wyle) treats his former sister-in-law Elaine (Rebecca De Mornay) after she has a minor accident, thereby triggering a whole new romantic chapter in Carter's life. And Jeanie (Gloria Reuben) receives a marriage proposal. ~ Hal Erickson, Rovi