Person of Interest: Season 2, Episode 21

Zero Day (2 May 2013)

TV Episode  -   -  Action | Drama | Mystery
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Ratings: 9.5/10 from 1,158 users  
Reviews: 2 user | 1 critic

It's been ten days since the machine has provided a number, which means Carter has had ten days of dead bodies piling up. Finch discovers that a company called Decima is responsible for the... See full summary »


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Title: Zero Day (02 May 2013)

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Episode cast overview, first billed only:
Lionel Fusco (credit only)
John Nolan ...
Kevin Morrow ...
IAB Detective Ed Solis (as Kevyn Morrow)
Claudia Sugarman
Carter Gill ...
Office Drone
ESU Captain


It's been ten days since the machine has provided a number, which means Carter has had ten days of dead bodies piling up. Finch discovers that a company called Decima is responsible for the virus which is causing these problems of inconsistency. The machine finally does dispense a number, it belonging to Ernest Thornhill, whose business of late has been buying up pay phone companies. As Finch and Reese track Thornhill, who they have yet actually to see, they find out some important information about him and exactly why the machine dispensed his number. But also aware of that fact is Root, who, using her own brand of persuasion, convinces Finch that they need to work together to battle Decima and the virus. Reese becomes aware that Root is back in the picture, he who gets some help from an old acquaintance in tracking Finch and Root. Their competing goals will all come to a head at midnight Eastern time, when the virus is scheduled to do its job. Meanwhile, Carter, in conjunction with ... Written by Huggo

Plot Summary | Plot Synopsis


TV-14 | See all certifications »




Release Date:

2 May 2013 (USA)  »

Company Credits

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Aspect Ratio:

16:9 HD
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Did You Know?


This episode's opening narration is distorted and difficult to understand, in relation to the plotline of the virus that is affecting The Machine. See more »


Nathan Ingram: [to Finch] You don't want to get married under another one of your pseudonyms? You don't think she will consent to be Mrs. Ostrich?
See more »


References North by Northwest (1959) See more »

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User Reviews

Mind Blowing
5 May 2013 | by (India) – See all my reviews

One of the best episodes this season. Full of twists and turns

Jim Caviezel, you are a beauty. The whole episode keeps us on the edge and it kept me wondering what's gonna happen next. As the seasons unfold a lot of things about the MACHINE are disclosed.

Though I'd really want to see the past footage when Nathan dies and from where did Finch got his limping leg and injured spine.

This was helluva episode, as good as the season finale. Just imagining if the penultimate episode left us on a cliffhanger, what's going to be the finale.

Eagerly looking forward to it. Cheers Jonathan Nolan, one great Television series you have made. It just got renewed for 3rd season too (Excited for that)

Hope this one makes up to 8-9 or 10 seasons...just can't seem to get bored of it. kudos guys, thanks for PERSON OF INTEREST.

25 of 25 people found this review helpful.  Was this review helpful to you?

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The writing in this show is phenomenal DArKnight108
4x11 promo...doesn't look so good for team machine. cutegal07
Will Fusco Learn About the Machine? Robsonmonkey
About the avatar of Samaritan Refiniaso
Series low in ratings. danoberman
Show starting to stink... nutznutz
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