S04E05: The Constant
Sayid and Desmond hit a bit of turbulence on the way to the freighter, which causes Desmond to experience some unexpected side effects.
Previous Episode 
Season 1
Pilot (1)
S1E1 / 22 Sep 2004
Pilot (2)
S1E2 / 29 Sep 2004
Tabula Rasa
S1E3 / 06 Oct 2004
Walkabout
S1E4 / 13 Oct 2004
White Rabbit
S1E5 / 20 Oct 2004
House of the Rising Sun
S1E6 / 27 Oct 2004
The Moth
S1E7 / 03 Nov 2004
Confidence Man
S1E8 / 10 Nov 2004
Solitary
S1E9 / 17 Nov 2004
Raised by Another
S1E10 / 01 Dec 2004
All the Best Cowboys Have Daddy Issues
S1E11 / 08 Dec 2004
Whatever the Case May Be
S1E12 / 05 Jan 2005
Hearts and Minds
S1E13 / 12 Jan 2005
Special
S1E14 / 19 Jan 2005
Homecoming
S1E15 / 09 Feb 2005
Outlaws
S1E16 / 16 Feb 2005
...In Translation
S1E17 / 23 Feb 2005
Numbers
S1E18 / 02 Mar 2005
Deus Ex Machina
S1E19 / 30 Mar 2005
Do No Harm
S1E20 / 06 Apr 2005
The Greater Good
S1E21 / 04 May 2005
Born to Run
S1E22 / 11 May 2005
Exodus (1)
S1E23 / 18 May 2005
Exodus (2)
S1E24 / 25 May 2005
Season 2
Man of Science, Man of Faith
S2E1 / 21 Sep 2005
Adrift
S2E2 / 28 Sep 2005
Orientation
S2E3 / 05 Oct 2005
Everybody Hates Hugo
S2E4 / 12 Oct 2005
...And Found
S2E5 / 19 Oct 2005
Abandoned
S2E6 / 09 Nov 2005
The Other 48 Days
S2E7 / 16 Nov 2005
Collision
S2E8 / 23 Nov 2005
What Kate Did
S2E9 / 30 Nov 2005
The 23rd Psalm
S2E10 / 11 Jan 2006
The Hunting Party
S2E11 / 18 Jan 2006
Fire + Water
S2E12 / 25 Jan 2006
The Long Con
S2E13 / 08 Feb 2006
One of Them
S2E14 / 15 Feb 2006
Maternity Leave
S2E15 / 01 Mar 2006
The Whole Truth
S2E16 / 22 Mar 2006
Lockdown
S2E17 / 29 Mar 2006
Dave
S2E18 / 05 Apr 2006
S.O.S.
S2E19 / 12 Apr 2006
Two for the Road
S2E20 / 03 May 2006
?
S2E21 / 10 May 2006
Three Minutes
S2E22 / 17 May 2006
Live Together, Die Alone (1)
S2E23 / 24 May 2006
Live Together, Die Alone (2)
S2E24 / 24 May 2006
Season 3
A Tale of Two Cities
S3E1 / 04 Oct 2006
The Glass Ballerina
S3E2 / 11 Oct 2006
Further Instructions
S3E3 / 18 Oct 2006
Every Man for Himself
S3E4 / 25 Oct 2006
The Cost of Living
S3E5 / 01 Nov 2006
I Do
S3E6 / 08 Nov 2006
Not in Portland
S3E7 / 07 Feb 2007
Flashes Before Your Eyes
S3E8 / 14 Feb 2007
Stranger in a Strange Land
S3E9 / 21 Feb 2007
Tricia Tanaka Is Dead
S3E10 / 28 Feb 2007
Enter 77
S3E11 / 07 Mar 2007
Par Avion
S3E12 / 14 Mar 2007
The Man from Tallahassee
S3E13 / 21 Mar 2007
Exposé
S3E14 / 28 Mar 2007
Left Behind
S3E15 / 04 Apr 2007
One of Us
S3E16 / 11 Apr 2007
Catch-22
S3E17 / 18 Apr 2007
D.O.C.
S3E18 / 25 Apr 2007
The Brig
S3E19 / 02 May 2007
The Man Behind the Curtain
S3E20 / 09 May 2007
Greatest Hits
S3E21 / 16 May 2007
Through the Looking Glass (1)
S3E22 / 23 May 2007
Through the Looking Glass (2)
S3E23 / 23 May 2007
Season 4
The Beginning of the End
S4E1 / 31 Jan 2008
Confirmed Dead
S4E2 / 07 Feb 2008
The Economist
S4E3 / 14 Feb 2008
Eggtown
S4E4 / 21 Feb 2008
The Constant
S4E5 / 28 Feb 2008
The Other Woman
S4E6 / 06 Mar 2008
Ji Yeon
S4E7 / 13 Mar 2008
Meet Kevin Johnson
S4E8 / 20 Mar 2008
The Shape of Things to Come
S4E9 / 24 Apr 2008
Something Nice Back Home
S4E10 / 01 May 2008
Cabin Fever
S4E11 / 08 May 2008
There's No Place Like Home (1)
S4E12 / 15 May 2008
There's No Place Like Home (2)
S4E13 / 29 May 2008
Season 5
Because You Left
S5E1 / 21 Jan 2009
The Lie
S5E2 / 21 Jan 2009
Jughead
S5E3 / 28 Jan 2009
The Little Prince
S5E4 / 04 Feb 2009
This Place Is Death
S5E5 / 11 Feb 2009
316
S5E6 / 18 Feb 2009
The Life and Death of Jeremy Bentham
S5E7 / 25 Feb 2009
LaFleur
S5E8 / 04 Mar 2009
Namaste
S5E9 / 18 Mar 2009
He's Our You
S5E10 / 25 Mar 2009
Whatever Happened, Happened
S5E11 / 01 Apr 2009
Dead Is Dead
S5E12 / 08 Apr 2009
Some Like It Hoth
S5E13 / 15 Apr 2009
The Variable
S5E14 / 29 Apr 2009
Follow the Leader
S5E15 / 06 May 2009
The Incident (1)
S5E16 / 13 May 2009
The Incident (2)
S5E17 / 13 May 2009
Season 6
LA X (1)
S6E1 / 02 Feb 2010
LA X (2)
S6E2 / 02 Feb 2010
What Kate Does
S6E3 / 09 Feb 2010
The Substitute
S6E4 / 16 Feb 2010
Lighthouse
S6E5 / 23 Feb 2010
Sundown
S6E6 / 02 Mar 2010
Dr. Linus
S6E7 / 09 Mar 2010
Recon
S6E8 / 16 Mar 2010
Ab Aeterno
S6E9 / 23 Mar 2010
The Package
S6E10 / 30 Mar 2010
Happily Ever After
S6E11 / 06 Apr 2010
Everybody Loves Hugo
S6E12 / 13 Apr 2010
The Last Recruit
S6E13 / 20 Apr 2010
The Candidate
S6E14 / 04 May 2010
Across the Sea
S6E15 / 11 May 2010
What They Died For
S6E16 / 18 May 2010
The End
S6E17 / 23 May 2010
Matthew Fox
Jack Shephard
Evangeline Lilly
Kate Austen
Terry O'Quinn
John Locke
Josh Holloway
James Sawyer
Michael Emerson
Benjamin Linus
Jorge Garcia
Hurley Reyes
Naveen Andrews
Sayid Jarrah
