: Tensions rise as the ER becomes increasingly dangerous. In the episode "Insurrection," Dr. Carter leads a walkout to demand metal detectors after multiple security incidents.
: Following his breakup with Abby, Luka enters a downward spiral of depression, drinking, and reckless behavior before seeking redemption in Africa. ER - Season 9
The ninth season of the American medical drama series ER premiered on September 26, 2002, and concluded on May 15, 2003, with 22 episodes. This season marked a significant turning point as Dr. John Carter, played by Noah Wyle, became the central character following the death of the series' original lead, Dr. Mark Greene, at the end of Season 8. Core Themes and Plot Evolution : Tensions rise as the ER becomes increasingly dangerous