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Season 1 - Sep. 22, 2004
Season 2 - Sep. 21, 2005
Season 3 - Oct. 04, 2006
Season 4 - Jan. 31, 2008
Season 5 - Jan. 21, 2009
Season 6 - Feb. 02, 2010

Lost Season 5 Episode 17
HD
Overview:
Jack’s decision to put a plan in action in order to set things right on the island is met with some strong resistance by those close to him, and Locke assigns Ben a difficult task.