Premiered 2004-2010. The survivors of a plane crash are forced to live with each other on a remote island, a dangerous new world that poses unique threats of its own.

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Season 6

18	The End (2)	23 May 2010
17	The End, Part 1	23 May 2010
16	What They Died For	18 May 2010
15	Across the Sea	11 May 2010
14	The Candidate	4 May 2010
13	The Last Recruit	20 Apr 2010
12	Everybody Loves Hugo	????
11	Happily Ever After	6 Apr 2010
10	The Package	30 March 2010
9	Ab Aeterno	April 2010
8	Recon	3 March 2010
7	Dr. Linus	2010
6	Sundown	February 2010
5	Lighthouse	23 February 2010
4	The Substitute	16 February 2010
3	What Kate Does	9 February 2010
2	LA X: Part 2	2 February 2010
1	LA X: Part 1	2 February 2010

Season 5

18	Final Chapter	2 Feb 2010
17	The Incident: Part 2	13 May 2009
16	The Incident	13 May 2009
15	Follow the Leader	6 May 2009
14	The Variable	29 April 2009
13	Some Like It Hoth	15 April 2009
12	Dead Is Dead	8 April 2009
11	Whatever Happened, Happened	1 April 2009
10	He's Our You	25 March 2009
9	Namaste	18 March 2009
8	LaFleur	4 March 2009
7	The Life and Death of Jeremy Bentham	25 February 2009
6	316	18 February 2009
5	This Place Is Death	11 February 2009
4	The Little Prince	4 February 2009
3	Jughead	28 January 2009
2	The Lie	21 January 2009
1	Because You Left	21 January 2009

Season 4

14	Episode #4.14	????
13	There's No Place Like Home: Part 2	29 May 2008
12	There's No Place Like Home: Part 1	15 May 2008
11	Cabin Fever	8 May 2008
10	Something Nice Back Home	1 May 2008
9	The Shape of Things to Come	24 April 2008
8	Meet Kevin Johnson	20 March 2008
7	Ji Yeon	13 March 2008
6	The Other Woman	6 March 2008
5	The Constant	28 February 2008
4	Eggtown	21 February 2008
3	The Economist	14 February 2008
2	Confirmed Dead	7 February 2008
1	The Beginning of the End	31 January 2008

Season 3

31	Missing Pieces 8: Buried Secrets	30 Dec 2007
30	Missing Pieces 7: Arzt & Crafts	24 Dec 2007
23	Through the Looking Glass, Part 2	23 May 2007
22	Through the Looking Glass	23 May 2007
21	Greatest Hits	16 May 2007
20	The Man Behind the Curtain	9 May 2007
19	The Brig	2 May 2007
18	D.O.C.	25 April 2007
17	Catch-22	18 April 2007
16	One of Us	11 April 2007
15	Left Behind	4 April 2007
14	Exposé	28 March 2007
13	The Man from Tallahassee	21 March 2007
12	Par Avion	14 March 2007
11	Enter 77	7 March 2007
10	Tricia Tanaka Is Dead	28 February 2007
9	Stranger in a Strange Land	21 February 2007
8	Flashes Before Your Eyes	14 February 2007
7	Not in Portland	7 February 2007
6	I Do	8 November 2006
5	The Cost of Living	1 November 2006
4	Every Man for Himself	25 October 2006
3	Further Instructions	18 October 2006
2	The Glass Ballerina	11 October 2006
1	A Tale of Two Cities	4 October 2006

Season 2

24	Live Together, Die Alone (2)	23 May 2006
23	Live Together, Die Alone	24 May 2006
22	Three Minutes	17 May 2006
21	?	10 May 2006
20	Two for the Road	3 May 2006
19	S.O.S.	12 April 2006
18	Dave	5 April 2006
17	Lockdown	29 March 2006
16	The Whole Truth	22 March 2006
15	Maternity Leave	1 March 2006
14	One of Them	15 February 2006
13	The Long Con	8 February 2006
12	Fire + Water	25 January 2006
11	The Hunting Party	18 January 2006
10	The 23rd Psalm	11 January 2006
9	What Kate Did	30 November 2005
8	Collision	23 November 2005
7	The Other 48 Days	16 November 2005
6	Abandoned	9 November 2005
5	...And Found	19 October 2005
4	Everybody Hates Hugo	12 October 2005
3	Orientation	5 October 2005
2	Adrift	28 September 2005
1	Man of Science, Man of Faith	21 September 2005

Season 1

25	Exodus (3)	29 Nov 2011
24	Exodus: Part 2	25 May 2005
23	Exodus: Part 1	18 May 2005
22	Born to Run	11 May 2005
21	The Greater Good	4 May 2005
20	Do No Harm	6 April 2005
19	Deus Ex Machina	30 March 2005
18	Numbers	2 March 2005
17	...In Translation	23 February 2005
16	Outlaws	16 February 2005
15	Homecoming	9 February 2005
14	Special	19 January 2005
13	Hearts and Minds	12 January 2005
12	Whatever the Case May Be	5 January 2005
11	All the Best Cowboys Have Daddy Issues	8 December 2004
10	Raised by Another	1 December 2004
9	Solitary	17 November 2004
8	Confidence Man	10 November 2004
7	The Moth	3 November 2004
6	House of the Rising Sun	27 October 2004
5	White Rabbit	20 October 2004
4	Walkabout	13 October 2004
3	Tabula Rasa	6 October 2004
2	Pilot: Part 2	29 September 2004
1	Pilot: Part 1	22 September 2004