ER: Season 4, Episode 1

4 - 1: Ambush

The ER is under the bright lights when a television documentary is filmed depicting a typical day in the ER. British trauma specialist Elizabeth Corday joins the staff. Carter restarts his residency, this time in the ER. A man is paralyzed while breaking up a gang fight. Morgenstern suffers a heart attack. Mark's stress level continues to build.