Seasons
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Season 1 Sep. 22, 2004
- Episode 1: Pilot Part 1
- Episode 2: Pilot Part 2
- Episode 3: Tabula Rasa
- Episode 4: Walkabout
- Episode 5: White Rabbit
- Episode 6: House of the Rising Sun
- Episode 7: The Moth
- Episode 8: Confidence Man
- Episode 9: Solitary
- Episode 10: Raised by Another
- Episode 11: All the Best Cowboys Have Daddy Issues
- Episode 12: Whatever the Case May Be
- Episode 13: Hearts and Minds
- Episode 14: Special
- Episode 15: Homecoming
- Episode 16: Outlaws
- Episode 17: ...In Translation
- Episode 18: Numbers
- Episode 19: Deus Ex Machina
- Episode 20: Do No Harm
- Episode 21: The Greater Good
- Episode 22: Born to Run
- Episode 23: Exodus Part 1
- Episode 24: Exodus Part 2
Season 2 Sep. 21, 2005
- Episode 1: Man of Science, Man of Faith
- Episode 2: Adrift
- Episode 3: Orientation
- Episode 4: Everybody Hates Hugo
- Episode 5: ...And Found
- Episode 6: Abandoned
- Episode 7: The Other 48 Days
- Episode 8: Collision
- Episode 9: What Kate Did
- Episode 10: The 23rd Psalm
- Episode 11: The Hunting Party
- Episode 12: Fire + Water
- Episode 13: The Long Con
- Episode 14: One of Them
- Episode 15: Maternity Leave
- Episode 16: The Whole Truth
- Episode 17: Lockdown
- Episode 18: Dave
- Episode 19: S.O.S.
- Episode 20: Two for the Road
- Episode 21: ?
- Episode 22: Three Minutes
- Episode 23: Live Together, Die Alone (1)
- Episode 24: Live Together, Die Alone (2)
Season 3 Oct. 04, 2006
- Episode 1: A Tale of Two Cities
- Episode 2: The Glass Ballerina
- Episode 3: Further Instructions
- Episode 4: Every Man for Himself
- Episode 5: The Cost of Living
- Episode 6: I Do
- Episode 7: Not in Portland
- Episode 8: Flashes Before Your Eyes
- Episode 9: Stranger in a Strange Land
- Episode 10: Tricia Tanaka Is Dead
- Episode 11: Enter 77
- Episode 12: Par Avion
- Episode 13: The Man from Tallahassee
- Episode 14: Exposé
- Episode 15: Left Behind
- Episode 16: One of Us
- Episode 17: Catch-22
- Episode 18: D.O.C.
- Episode 19: The Brig
- Episode 20: The Man Behind the Curtain
- Episode 21: Greatest Hits
- Episode 22: Through the Looking Glass (1)
- Episode 23: Through The Looking Glass (2)
Season 4 Jan. 31, 2008
- Episode 1: The Beginning of the End
- Episode 2: Confirmed Dead
- Episode 3: The Economist
- Episode 4: Eggtown
- Episode 5: The Constant
- Episode 6: The Other Woman
- Episode 7: Ji Yeon
- Episode 8: Meet Kevin Johnson
- Episode 9: The Shape of Things to Come
- Episode 10: Something Nice Back Home
- Episode 11: Cabin Fever
- Episode 12: There's No Place Like Home (1)
- Episode 13: There's No Place Like Home (2)
- Episode 14: There's No Place Like Home (3)
Season 5 Jan. 21, 2009
- Episode 1: Because You Left
- Episode 2: The Lie
- Episode 3: Jughead
- Episode 4: The Little Prince
- Episode 5: This Place Is Death
- Episode 6: 316
- Episode 7: The Life and Death of Jeremy Bentham
- Episode 8: LaFleur
- Episode 9: Namaste
- Episode 10: He's Our You
- Episode 11: Whatever Happened, Happened
- Episode 12: Dead Is Dead
- Episode 13: Some Like It Hoth
- Episode 14: The Variable
- Episode 15: Follow the Leader
- Episode 16: The Incident (1)
- Episode 17: The Incident (2)
Season 6 Feb. 02, 2010
- Episode 1: LA X (1)
- Episode 2: LA X (2)
- Episode 3: What Kate Does
- Episode 4: The Substitute
- Episode 5: Lighthouse
- Episode 6: Sundown
- Episode 7: Dr. Linus
- Episode 8: Recon
- Episode 9: Ab Aeterno
- Episode 10: The Package
- Episode 11: Happily Ever After
- Episode 12: Everybody Loves Hugo
- Episode 13: The Last Recruit
- Episode 14: The Candidate
- Episode 15: Across the Sea
- Episode 16: What They Died For
- Episode 17: The End (1)
- Episode 18: The End (2)
- Episode 19: New Man In Charge
Lost Season 6 Episode 1
A parallel universe, in which the crash never happened, is revealed as an aftermath of the bomb’s detonation. Meanwhile, Sawyer blames Jack for the loss of Juliet and the true identity of the monster is revealed.