Fall TV Catch-Up Guide: 'Person of Interest'

Nautilus -- Although Finch (Michael Emerson, left) insists that he no longer wishes to help with new numbers, his interest is piqued when Reese (Jim Caviezel, right) learns that the newest POI is a brilliant college student engaged in a mysterious, life-and-death scavenger hunt, on PERSON OF INTEREST, Tuesday, Sept. 30 (10:01-11:00 PM ET/PT) on the CBS Television Network. Photo: Jeff Neumann/CBS. 2014 CBS Broadcasting Inc. All Rights Reserved
Nautilus -- Although Finch (Michael Emerson, left) insists that he no longer wishes to help with new numbers, his interest is piqued when Reese (Jim Caviezel, right) learns that the newest POI is a brilliant college student engaged in a mysterious, life-and-death scavenger hunt, on PERSON OF INTEREST, Tuesday, Sept. 30 (10:01-11:00 PM ET/PT) on the CBS Television Network. Photo: Jeff Neumann/CBS. 2014 CBS Broadcasting Inc. All Rights Reserved

When's It Back? Tuesday, Sept. 23 at 10 p.m. on CBS

Where We Left Off: Samaritan is online, and everyone — even The Machine — is now in hiding. Greer revealed that terrorist organization Vigilance was just a patsy so Decima could gain access to government surveillance feeds.

[Related: 'Person of Interest' Finale: Behind the Scenes With Amy Acker and Sarah Shahi]

Cut off from Finch's formerly deep pockets, the only thing Team Machine has going for it is a tiny virus Root installed that makes them invisible to Samaritan. They can't meet up because Decima is still looking for them; the only thing they can do is hunker down and wait for an opportunity to strike back.

What We Know About Season 4: Reese, Finch, Root, Shaw, and even Fusco will be trying to find a way to keep up with The Machine's numbers, while at the same time avoiding the watchful eye of Samaritan.

It's hard for the show to maintain its science-fiction edge — telling stories about living in an age of surveillance — when real-world facts like the Edward Snowden revelations keep topping the fiction. The one thing that's still pure fiction is the show's artificial intelligences: thinking software with varying amounts of morality. As The Machine continues to display more personality, we'll likely see Samaritan do the same, which will drive the show through the next season.

Our Burning Question: Obviously, we want to know what happens when two gods go to war — the nearly omniscient Machine now has a rival who just might be insane. But really, we want to know when we'll get our spinoff of Shaw and Root as merciless assassins working the cosmetics counter at a mall.

More Fall TV Catch-Up Guides:

Arrow
The Vampire Diaries
Once Upon a Time
Brooklyn Nine-Nine
Scandal
Grey's Anatomy
Parenthood
The Good Wife
The Blacklist
NCIS
Marvel's Agents of S.H.I.E.L.D.
Sleepy Hollow
The Big Bang Theory
The Mindy Project