List of Lost episodes

One-hundred-twenty-one Lost episodes aired between September 22, 2004, and May 23, 2010. J. J. Abrams, who co-created the American serial drama television series Lost with Damon Lindelof, directed the pilot episode, which was based upon an original script titled Nowhere written by Jeffrey Lieber. Six seasons of the show aired, in addition to numerous clip shows to recap previous episodes. American Broadcasting Company (ABC), the producer of Lost, announced that the series would end after six seasons.

The series follows the experiences of the survivors of a plane crash on a passenger jet, Oceanic Flight 815, which crashed on a tropical island in the South Pacific, with each episode typically featuring action on the island as well as a secondary storyline from another point in a character's life. The series also includes stories of the lives of people already living on the island — they include the "Others", who initially antagonize the survivors, as well as a group of people who arrive on the freighter Kahana. Lost: Missing Pieces consists of thirteen original two- to three-minute clips referred to as "mobisodes" which were produced for cell phones and released between seasons three and four. Multiple former and recurring cast members made an appearance in the series finale.

In the following list, the term "featured character(s)" refers to the character or characters who are featured in the secondary storyline of each episode.

Season one aired from September 22, 2004, to May 25, 2005. In addition to the twenty-four regular episodes in season one, a special, "Lost: The Journey", aired on April 27, 2005, to put the mysteries of the island and the characters in perspective in the lead-up to the season finale.

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