ER: Season 4, Episode 17

4 - 17: A Bloody Mess

Corday tries a new experimental procedure on an Asian gentleman without permission from either the patient or a relative. Scott Anspaugh, finally released from the hospital, suffers an attack during a wall-climbing expedition with Jeanie. They discover that he will need a bone marrow transplant. Benton accidentally backs into a pedestrian at a gas station. Dr. Morgenstern makes his return to the ER, with a new outlook on life and his patients. Carter visits Chase, who has suffered brain damage from a heroin overdose.