Person of Interest (2011–2016)
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Samaritan launches a cyber-attack on the stock exchange, leaving the team with no choice but to embark on a possible suicide mission in a desperate attempt to stop a global economic catastrophe.


Chris Fisher


Jonathan Nolan (created by), Denise Thé | 2 more credits »





Episode cast overview, first billed only:
Jim Caviezel ... John Reese
Kevin Chapman ... Lionel Fusco
Amy Acker ... Root
Sarah Shahi ... Sameen Shaw
Michael Emerson ... Harold Finch
Julian Ovenden ... Jeremy Lambert
Cara Buono ... Martine Rousseau
John Nolan ... John Greer
Mark Gessner ... Gary
Chris LaPanta ... Kenneth (as Christopher LaPanta)
Brennan Taylor Brennan Taylor ... Investment Banker
Charles Techman ... Old Man
Gameela Wright ... Single Mom
Greg McFadden Greg McFadden ... Businessman
Chester Jones III ... Monty


The first act following the Machine and Samaritan's cold war summit, which ended in a standoff, is that Samaritan starts to take the market down by crashing the New York Stock Exchange. Samaritan's plan entails a few small rebounds to prevent the fail-safe system from kicking in. Reese, Finch, Root and Fusco know that the best way to combat this take down is not to deal with anything on the market floor, where the minority of trades are actually made, but to deal with the server in the Exchange's basement, the server which processes the vast majority of trades. Shaw is not with them as she still needs to hide from Samaritan's cameras. As such, Shaw has her own task off site. Both the foursome and Shaw's tasks end up not being as straightforward as they would have liked, each placed in a precariously life threatening situation. Root has to wait for the Machine to evaluate all the possible options for success before moving. The question becomes if there is not one option which has a ... Written by Huggo

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Release Date:

6 January 2015 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

16:9 HD
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Did You Know?


The highest rated episode in the entire series along with the series finale "Return 0". See more »


While Harold is teaching the machine chess and is talking about the history of the queen and its use as a sacrifice, he forces the machine's queen into a position where he can take it with his rook, but then when the camera enters slow motion when he makes his move, it shows him taking the machine's king instead, despite none of his pieces having been in a position to do so. Furthermore, the king is never actually taken in chess, because if it's in a position where it could be taken (check) then the player is required to remove it from danger, either by moving it or by blocking the piece threatening it. If it's impossible to get the king to safety, then the game is over without the king ever actually being taken (checkmate). See more »


Root: Hey, sweetie, you busy?
Sameen Shaw: A little. Skip the verbal foreplay, Root. Why you calling?
Root: Can't a couple of gals take a little break from work to catch up?
Sameen Shaw: I've been arrested and you're fighting an AI apocalypse so, no, we don't have time to catch up.
Root: Well, there's no need to be rude.
Sameen Shaw: I am not having this conversation right now.
Root: There's no time like the present, Sameen. Why are you so afraid to talk about your feelings?
Sameen Shaw: [Scoffs] Feelings? I'm a sociopath. I don't have feelings.
Root: And I'm a reformed ...
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Fortune Days
Written by Edward Ma, 'Justin Boreta, and Josh Mayer (as Josh Lawrence Mayer)
Performed by The Glitch Mob
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User Reviews

Craftsmanship that we don't expect from network television
1 February 2015 | by susy-7See all my reviews

Kudos to Nolan, et al., the writers and actors for this episode, If-Then-Else, which competes right up there with any episode of The Americans, Homeland and other cablers whose greatness everyone knows about **because we hear it all the time**. We do not hear much about PoI from the talking heads and it is certainly no media darling, perhaps because it is a CBS show, or because Jim Cavaziel's Reece's expressionless monotone, or maybe because many critics wrote it off early in the first season. I am glad we stayed with it, as over the years this show has become not just a strong ensemble piece, but one of the most tightly crafted dramas airing on television. And those characterizations that annoyed critics the first season (Reece's grumble-like monotone, the idea of an all-knowing government spying on us) either turned into an important part of the ensemble's interplay, or was revealed as a prescient warning -- "holy crap! the Government actually IS spying on us!"

This uniquely structured episode rewards us longtime viewers with character-driven humor, with pathos and even a sly wink that comes right up the 4th Wall barrier, without truly breaking it. At the same time, If-Then-Else was filmed beautifully with the kinds of additional touches that one does not expect from cost-conscious network shows.

Just, really good job to all involved in this roller coaster of an episode and thank you for respecting the intelligence, loyalty and discrimination of your audience.

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