Michael Johnson

As the result of a school shooting, Kovac and Benton care for the gunman and his victims. Abby discovers that Carter has been illegally injecting pain relievers. Greene and Weaver confront Carter about his problem, and Weaver orders him to enter a drug rehabilitation center or leave the hospital permanently. Carter refuses but is later approached by Benton, who insists that Carter go to Atlanta for the detox program. Benton accompanies Carter on the flight.

Walker becomes the guardian of a 7-year-old boy who unknowingly contracted AIDS from his drug-addicted mother, who left him behind after escaping a drug bust.

Walker must find the courage to tell 7-year-old Lucas that he has AIDS, after the boy's mother dies of the disease.