ER, Season 12
Television series season
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![Amazon.com: ER: The Complete Twelfth Season [DVD] [2008] [UK ...](/imgres?imgurl=https://m.media-amazon.com/images/I/51Ssa5hPPIL._AC_UF894,1000_QL80_.jpg&imgrefurl=https://www.amazon.com/ER-Season-12-Import-anglais/dp/B0017U09JY&h=1000&w=675&tbnid=UZECDW3VIoUdzM&q=ER,+Season+12&tbnh=149&tbnw=101&usg=AI4_-kTnhIswoU-1MbU68DveL0XA9A2Uuw&vet=1&docid=_Xvv_ToSqWCA9M&sa=X&ved=2ahUKEwjJ9N6w9NuFAxUlb_UHHZGgCUQQ9QF6BAgAEAg)
The twelfth season of the American fictional drama television series ER first aired on September 22, 2005, and concluded on May 18, 2006. It consists of 22 episodes. Wikipedia
Number of episodes: 22