Jeanie (Gloria Reuben) concludes that Scott Anspaugh (Trevor Morgan) will need a bone-marrow transplant. A distracted Benton (Eriq La Salle) injures a pedestrian with his car. Morganstern (William H. Macy) returns to the ER after recovering from his heart attack. Carol (Julianna Margulies) learns a disturbing secret about a 16-year-old female patient. Del Amico (Maria Bello) tends to Karen Fun (Kimberly Russell), whose fourth pregnancy may end in miscarriage like the previous three. And Corday (Alex Kingston) performs a risky procedure on a patient -- without securing permission from anyone. ~ Hal Erickson, Rovi