S01E13: Root Cause
The Machine gives Reese and Finch the number of a down-and-out man who has been pushed too far, and they're forced to turn to former Person of Interest, Zoe Morgan, for help.
Previous Episode 
Season 1
Pilot
S1E1 / 22 Sep 2011
Ghosts
S1E2 / 29 Sep 2011
Mission Creep
S1E3 / 06 Oct 2011
Cura Te Ipsum
S1E4 / 13 Oct 2011
Judgement
S1E5 / 20 Oct 2011
The Fix
S1E6 / 27 Oct 2011
Witness
S1E7 / 03 Nov 2011
Foe
S1E8 / 17 Nov 2011
Get Carter
S1E9 / 08 Dec 2011
Number Crunch
S1E10 / 15 Dec 2011
Super
S1E11 / 12 Jan 2012
Legacy
S1E12 / 19 Jan 2012
Root Cause
S1E13 / 02 Feb 2012
Wolf and Cub
S1E14 / 09 Feb 2012
Blue Code
S1E15 / 16 Feb 2012
Risk
S1E16 / 23 Feb 2012
Baby Blue
S1E17 / 08 Mar 2012
Identity Crisis
S1E18 / 29 Mar 2012
Flesh and Blood
S1E19 / 05 Apr 2012
Matsya Nyaya
S1E20 / 26 Apr 2012
Many Happy Returns
S1E21 / 03 May 2012
No Good Deed
S1E22 / 10 May 2012
Firewall
S1E23 / 17 May 2012
Season 2
The Contingency
S2E1 / 27 Sep 2012
Bad Code
S2E2 / 04 Oct 2012
Masquerade
S2E3 / 18 Oct 2012
Triggerman
S2E4 / 25 Oct 2012
Bury the Lede
S2E5 / 01 Nov 2012
The High Road
S2E6 / 08 Nov 2012
Critical
S2E7 / 15 Nov 2012
Til Death
S2E8 / 29 Nov 2012
C.O.D.
S2E9 / 06 Dec 2012
Shadow Box
S2E10 / 13 Dec 2012
2πR
S2E11 / 03 Jan 2013
Prisoner's Dilemma
S2E12 / 10 Jan 2013
Dead Reckoning
S2E13 / 31 Jan 2013
One Percent
S2E14 / 07 Feb 2013
Booked Solid
S2E15 / 14 Feb 2013
Relevance
S2E16 / 21 Feb 2013
Proteus
S2E17 / 07 Mar 2013
All In
S2E18 / 14 Mar 2013
Trojan Horse
S2E19 / 04 Apr 2013
In Extremis
S2E20 / 25 Apr 2013
Zero Day
S2E21 / 02 May 2013
God Mode
S2E22 / 09 May 2013
Season 3
Liberty
S3E1 / 24 Sep 2013
Nothing to Hide
S3E2 / 01 Oct 2013
Lady Killer
S3E3 / 08 Oct 2013
Reasonable Doubt
S3E4 / 15 Oct 2013
Razgovor
S3E5 / 22 Oct 2013
Mors Praematura
S3E6 / 29 Oct 2013
The Perfect Mark
S3E7 / 05 Nov 2013
Endgame
S3E8 / 12 Nov 2013
The Crossing
S3E9 / 19 Nov 2013
The Devil's Share
S3E10 / 26 Nov 2013
Lethe
S3E11 / 17 Dec 2013
Aletheia
S3E12 / 07 Jan 2014
4C
S3E13 / 14 Jan 2014
Provenance
S3E14 / 04 Feb 2014
Last Call
S3E15 / 25 Feb 2014
RAM
S3E16 / 04 Mar 2014
/
S3E17 / 18 Mar 2014
Allegiance
S3E18 / 25 Mar 2014
Most Likely To...
S3E19 / 01 Apr 2014
Death Benefit
S3E20 / 15 Apr 2014
Beta
S3E21 / 29 Apr 2014
A House Divided
S3E22 / 06 May 2014
Deus Ex Machina
S3E23 / 13 May 2014
Season 4
Panopticon
S4E1 / 23 Sep 2014
Nautilus
S4E2 / 30 Sep 2014
Wingman
S4E3 / 07 Oct 2014
Brotherhood
S4E4 / 14 Oct 2014
Prophets
S4E5 / 21 Oct 2014
Pretenders
S4E6 / 28 Oct 2014
Honor Among Thieves
S4E7 / 11 Nov 2014
Point of Origin
S4E8 / 18 Nov 2014
The Devil You Know
S4E9 / 25 Nov 2014
The Cold War
S4E10 / 16 Dec 2014
If-Then-Else
S4E11 / 06 Jan 2015
Control-Alt-Delete
S4E12 / 13 Jan 2015
M.I.A.
S4E13 / 03 Feb 2015
Guilty
S4E14 / 10 Feb 2015
Q&A
S4E15 / 17 Feb 2015
Blunt
S4E16 / 24 Feb 2015
Karma
S4E17 / 10 Mar 2015
Skip
S4E18 / 24 Mar 2015
Search and Destroy
S4E19 / 07 Apr 2015
Terra Incognita
S4E20 / 14 Apr 2015
Asylum
S4E21 / 28 Apr 2015
YHWH
S4E22 / 05 May 2015
Season 5
B.S.O.D.
S5E1 / 03 May 2016
SNAFU
S5E2 / 09 May 2016
Truth Be Told
S5E3 / 10 May 2016
6,741
S5E4 / 16 May 2016
ShotSeeker
S5E5 / 17 May 2016
A More Perfect Union
S5E6 / 23 May 2016
QSO
S5E7 / 24 May 2016
Reassortment
S5E8 / 24 May 2016
Sotto Voce
S5E9 / 30 May 2016
The Day the World Went Away
S5E10 / 31 May 2016
Synecdoche
S5E11 / 07 Jun 2016
.exe
S5E12 / 14 Jun 2016
return 0
S5E13 / 21 Jun 2016
Jim Caviezel
John Reese
Michael Emerson
Harold Finch
Kevin Chapman
Lionel Fusco
Amy Acker
Root
