S03E19: Lysergic Acid Diethylamide
In an effort to remove Bell's consciousness from Olivia's mind, Peter, Bell, and Walter enter Olivia's subconscious and attempt to find her personality, which has hidden itself somewhere safe.
Previous Episode 
Season 1
Pilot
S1E1 / 09 Sep 2008
The Same Old Story
S1E2 / 16 Sep 2008
The Ghost Network
S1E3 / 23 Sep 2008
The Arrival
S1E4 / 30 Sep 2008
Power Hungry
S1E5 / 14 Oct 2008
The Cure
S1E6 / 21 Oct 2008
In Which We Meet Mr. Jones
S1E7 / 11 Nov 2008
The Equation
S1E8 / 18 Nov 2008
The Dreamscape
S1E9 / 25 Nov 2008
Safe
S1E10 / 02 Dec 2008
Bound
S1E11 / 20 Jan 2009
The No-Brainer
S1E12 / 27 Jan 2009
The Transformation
S1E13 / 03 Feb 2009
Ability
S1E14 / 10 Feb 2009
Inner Child
S1E15 / 07 Apr 2009
Unleashed
S1E16 / 14 Apr 2009
Bad Dreams
S1E17 / 21 Apr 2009
Midnight
S1E18 / 28 Apr 2009
The Road Not Taken
S1E19 / 05 May 2009
There's More Than One of Everything
S1E20 / 12 May 2009
Season 2
A New Day in the Old Town
S2E1 / 17 Sep 2009
Night of Desirable Objects
S2E2 / 24 Sep 2009
Fracture
S2E3 / 01 Oct 2009
Momentum Deferred
S2E4 / 08 Oct 2009
Dream Logic
S2E5 / 15 Oct 2009
Earthling
S2E6 / 05 Nov 2009
Of Human Action
S2E7 / 12 Nov 2009
August
S2E8 / 19 Nov 2009
Snakehead
S2E9 / 03 Dec 2009
Grey Matters
S2E10 / 10 Dec 2009
Unearthed
S2E11 / 11 Jan 2010
Johari Window
S2E12 / 14 Jan 2010
What Lies Below
S2E13 / 21 Jan 2010
The Bishop Revival
S2E14 / 28 Jan 2010
Jacksonville
S2E15 / 04 Feb 2010
Peter
S2E16 / 01 Apr 2010
Olivia. In the Lab. With the Revolver.
S2E17 / 08 Apr 2010
White Tulip
S2E18 / 15 Apr 2010
The Man From The Other Side
S2E19 / 22 Apr 2010
Brown Betty
S2E20 / 29 Apr 2010
Northwest Passage
S2E21 / 06 May 2010
Over There (1)
S2E22 / 13 May 2010
Over There (2)
S2E23 / 20 May 2010
Season 3
Olivia
S3E1 / 23 Sep 2010
The Box
S3E2 / 30 Sep 2010
The Plateau
S3E3 / 07 Oct 2010
Do Shapeshifters Dream of Electric Sheep?
S3E4 / 14 Oct 2010
Amber 31422
S3E5 / 04 Nov 2010
6955 kHz
S3E6 / 11 Nov 2010
The Abducted
S3E7 / 18 Nov 2010
Entrada
S3E8 / 02 Dec 2010
Marionette
S3E9 / 09 Dec 2010
The Firefly
S3E10 / 21 Jan 2011
Reciprocity
S3E11 / 28 Jan 2011
Concentrate and Ask Again
S3E12 / 04 Feb 2011
Immortality
S3E13 / 11 Feb 2011
6B
S3E14 / 18 Feb 2011
Subject 13
S3E15 / 25 Feb 2011
Os
S3E16 / 11 Mar 2011
Stowaway
S3E17 / 18 Mar 2011
Bloodline
S3E18 / 25 Mar 2011
Lysergic Acid Diethylamide
S3E19 / 15 Apr 2011
6:02 AM EST
S3E20 / 22 Apr 2011
The Last Sam Weiss
S3E21 / 29 Apr 2011
The Day We Died
S3E22 / 06 May 2011
Season 4
Neither Here Nor There
S4E1 / 23 Sep 2011
One Night in October
S4E2 / 30 Sep 2011
Alone in the World
S4E3 / 07 Oct 2011
Subject 9
S4E4 / 14 Oct 2011
Novation
S4E5 / 04 Nov 2011
And Those We've Left Behind
S4E6 / 11 Nov 2011
Wallflower
S4E7 / 18 Nov 2011
Back to Where You've Never Been
S4E8 / 13 Jan 2012
Enemy of My Enemy
S4E9 / 20 Jan 2012
Forced Perspective
S4E10 / 27 Jan 2012
Making Angels
S4E11 / 03 Feb 2012
Welcome to Westfield
S4E12 / 10 Feb 2012
A Better Human Being
S4E13 / 17 Feb 2012
The End of All Things
S4E14 / 24 Feb 2012
A Short Story About Love
S4E15 / 23 Mar 2012
Nothing As It Seems
S4E16 / 30 Mar 2012
Everything in Its Right Place
S4E17 / 06 Apr 2012
The Consultant
S4E18 / 13 Apr 2012
Letters of Transit
S4E19 / 20 Apr 2012
Worlds Apart
S4E20 / 27 Apr 2012
Brave New World (1)
S4E21 / 03 May 2012
Brave New World (2)
S4E22 / 11 May 2012
Season 5
Transilience Thought Unifier Model-11
S5E1 / 28 Sep 2012
In Absentia
S5E2 / 05 Oct 2012
The Recordist
S5E3 / 12 Oct 2012
The Bullet That Saved the World
S5E4 / 26 Oct 2012
An Origin Story
S5E5 / 02 Nov 2012
Through the Looking Glass and What Walter Found There
S5E6 / 09 Nov 2012
Five-Twenty-Ten
S5E7 / 16 Nov 2012
The Human Kind
S5E8 / 07 Dec 2012
Black Blotter
S5E9 / 14 Dec 2012
Anomaly XB-6783746
S5E10 / 21 Dec 2012
The Boy Must Live
S5E11 / 11 Jan 2013
Liberty
S5E12 / 18 Jan 2013
An Enemy of Fate
S5E13 / 18 Jan 2013
Anna Torv
Olivia Dunham
Joshua Jackson
Peter Bishop
Jasika Nicole
Astrid Farnsworth
