The first season of the television series Lost commenced airing in the United States and Canada on September 22, 2004, concluded on May 25, 2005, and contained 25. The home sites for this guide are for show info and for episode details. Contact Us: To correct episode titles. Spend the Dog Days of Summer with the Family; Summer Recipes Are As Easy as Pie; Enjoy Free Episodes with the TGIT Summer Vacation Package! blog ABC New Fall Shows. FACEBOOK: WEBSITE: . Watch Lost Online Full of adventure, Lost is an American drama television series which follows the lives of plane crash survivors stranded on a mysterious tropical. No. in series No. in season Title Directed by Written by Featured character(s) Original air date U.S. viewers (millions) 87: 1 Because You Left Stephen Williams FACEBOOK: WEBSITE: . This article contains episode summaries for the first season of Lost. Season summary. In the U.S., original episodes of season one aired between September 22, 2004. Watch Lost Full Episodes Online. Instantly find any Lost full episode available from all 6 seasons with videos, reviews, news and more! Episode 1: LAX Episode 2: LAX (2) Episode 3: What Kate Does Episode 4: The Substitute Episode 5: Lighthouse Episode 6: Sundown Episode 7: Dr. Linus.