Lost Episode Guide
Lost ran for 121 episodes across 6 seasons on ABC, starting on September 22, 2004 and ending on May 23, 2010. Use the season pages below for spoiler-light episode-by-episode coverage.
- Season 1 (25 episodes; September 22, 2004 to May 25, 2005).
- Season 2 (24 episodes; September 21, 2005 to May 24, 2006).
- Season 3 (23 episodes; October 4, 2006 to May 23, 2007).
- Season 4 (14 episodes; January 31, 2008 to May 29, 2008).
- Season 5 (17 episodes; January 21, 2009 to May 13, 2009).
- Season 6 (18 episodes; February 2, 2010 to May 23, 2010).