The twelfth season of the American fictional drama television series ER first aired on NBC on September 22, 2005, and concluded on May 18, 2006. It consists of 22 episodes.
Kovaàand Abby become the main central characters and their relationship slowly starts to get back on track as they deal with her unexpected pregnancy. A new nurse manager causes friction among the staff; following a successful operation, Weaver no longer needs her cane. Pratt journeys to Africa to join Carter on a relief mission, while a face from SamâÂÂs past leaves Abby and KovaÃÂâÂÂs lives hanging in the balance. In addition to Darfur, geopolitics of the day get a strong spotlight due to the Iraq War.
Following Sherry Stringfield's departure in the season premiere, this season becomes the first to not feature any of the original cast members in a regular capacity (Noah Wyle is featured for four episodes in a recurring capacity throughout the season).
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