24 of 24 episodes
S01E01
Pilot (1)
September 22, 2004
S01E02
Pilot (2)
September 29, 2004
S01E03
Tabula Rasa
October 6, 2004
S01E04
Walkabout
October 13, 2004
S01E05
White Rabbit
October 20, 2004
S01E06
House of the Rising Sun
October 27, 2004
S01E07
The Moth
November 3, 2004
S01E08
Confidence Man
November 10, 2004
S01E09
Solitary
November 17, 2004
S01E10
Raised by Another
December 1, 2004
S01E11
All the Best Cowboys Have Daddy Issues
December 8, 2004
S01E12
Whatever the Case May Be
January 5, 2005
S01E13
Hearts and Minds
January 12, 2005
S01E14
Special
January 19, 2005
S01E15
Homecoming
February 9, 2005
S01E16
Outlaws
February 16, 2005
S01E17
...In Translation
February 23, 2005
S01E18
Numbers
March 2, 2005
S01E19
Deus Ex Machina
March 30, 2005
S01E20
Do No Harm
April 6, 2005
S01E21
The Greater Good
May 4, 2005
S01E22
Born to Run
May 11, 2005
S01E23
Exodus (1)
May 18, 2005
S01E24
Exodus (2)
May 25, 2005
24 of 24 episodes
S02E01
Man of Science, Man of Faith
September 21, 2005
S02E02
Adrift
September 28, 2005
S02E03
Orientation
October 5, 2005
S02E04
Everybody Hates Hugo
October 12, 2005
S02E05
...And Found
October 19, 2005
S02E06
Abandoned
November 9, 2005
S02E07
The Other 48 Days
November 16, 2005
S02E08
Collision
November 23, 2005
S02E09
What Kate Did
November 30, 2005
S02E10
The 23rd Psalm
January 11, 2006
S02E11
The Hunting Party
January 18, 2006
S02E12
Fire + Water
January 25, 2006
S02E13
The Long Con
February 8, 2006
S02E14
One of Them
February 15, 2006
S02E15
Maternity Leave
March 1, 2006
S02E16
The Whole Truth
March 22, 2006
S02E17
Lockdown
March 29, 2006
S02E18
Dave
April 5, 2006
S02E19
S.O.S.
April 12, 2006
S02E20
Two for the Road
May 3, 2006
S02E21
?
May 10, 2006
S02E22
Three Minutes
May 17, 2006
S02E23
Live Together, Die Alone (1)
May 24, 2006
S02E24
Live Together, Die Alone (2)
May 24, 2006
23 of 23 episodes
S03E01
A Tale of Two Cities
October 4, 2006
S03E02
The Glass Ballerina
October 11, 2006
S03E03
Further Instructions
October 18, 2006
S03E04
Every Man for Himself
October 25, 2006
S03E05
The Cost of Living
November 1, 2006
S03E06
I Do
November 8, 2006
S03E07
Not in Portland
February 7, 2007
S03E08
Flashes Before Your Eyes
February 14, 2007
S03E09
Stranger in a Strange Land
February 21, 2007
S03E10
Tricia Tanaka Is Dead
February 28, 2007
S03E11
Enter 77
March 7, 2007
S03E12
Par Avion
March 14, 2007
S03E13
The Man from Tallahassee
March 21, 2007
S03E14
Exposé
March 28, 2007
S03E15
Left Behind
April 4, 2007
S03E16
One of Us
April 11, 2007
S03E17
Catch-22
April 18, 2007
S03E18
D.O.C.
April 25, 2007
S03E19
The Brig
May 2, 2007
S03E20
The Man Behind the Curtain
May 9, 2007
S03E21
Greatest Hits
May 16, 2007
S03E22
Through the Looking Glass (1)
May 23, 2007
S03E23
Through the Looking Glass (2)
May 23, 2007
13 of 13 episodes
S04E01
The Beginning of the End
January 31, 2008
S04E02
Confirmed Dead
February 7, 2008
S04E03
The Economist
February 14, 2008
S04E04
Eggtown
February 21, 2008
S04E05
The Constant
February 28, 2008
S04E06
The Other Woman
March 6, 2008
S04E07
Ji Yeon
March 13, 2008
S04E08
Meet Kevin Johnson
March 20, 2008
S04E09
The Shape of Things to Come
April 24, 2008
S04E10
Something Nice Back Home
May 1, 2008
S04E11
Cabin Fever
May 8, 2008
S04E12
There's No Place Like Home (1)
May 15, 2008
S04E13
There's No Place Like Home (2)
May 29, 2008
17 of 17 episodes
S05E01
Because You Left
January 21, 2009
S05E02
The Lie
January 21, 2009
S05E03
Jughead
January 28, 2009
S05E04
The Little Prince
February 4, 2009
S05E05
This Place Is Death
February 11, 2009
S05E06
316
February 18, 2009
S05E07
The Life and Death of Jeremy Bentham
February 25, 2009
S05E08
LaFleur
March 4, 2009
S05E09
Namaste
March 18, 2009
S05E10
He's Our You
March 25, 2009
S05E11
Whatever Happened, Happened
April 1, 2009
S05E12
Dead Is Dead
April 8, 2009
S05E13
Some Like It Hoth
April 15, 2009
S05E14
The Variable
April 29, 2009
S05E15
Follow the Leader
May 6, 2009
S05E16
The Incident (1)
May 13, 2009
S05E17
The Incident (2)
May 13, 2009
17 of 17 episodes
S06E01
LA X (1)
February 2, 2010
S06E02
LA X (2)
February 2, 2010
S06E03
What Kate Does
February 9, 2010
S06E04
The Substitute
February 16, 2010
S06E05
Lighthouse
February 23, 2010
S06E06
Sundown
March 2, 2010
S06E07
Dr. Linus
March 9, 2010
S06E08
Recon
March 16, 2010
S06E09
Ab Aeterno
March 23, 2010
S06E10
The Package
March 30, 2010
S06E11
Happily Ever After
April 6, 2010
S06E12
Everybody Loves Hugo
April 13, 2010
S06E13
The Last Recruit
April 20, 2010
S06E14
The Candidate
May 4, 2010
S06E15
Across the Sea
May 11, 2010
S06E16
What They Died For
May 18, 2010
S06E17
The End
May 23, 2010