Is it a bad sprain or a broken bone? A benign cyst or cancer? An accident or abuse? At Children's Hospital, the ER team is trained to find the cause-and find it quickly. In this program, a BB injury to the eye and a case of post-operative reactive psychosis serve as opportunities to see how doctors, nurses, and technicians use investigative skills and high-tech equipment in diagnosing mysterious maladies. You have to act with minimal amounts of information," says attending physician Elizabeth Powell, "but you've got to do something." (54 minutes)"