At the end of Person of Interest‘s third season, our heroes Reese, Finch, Shaw, and Root were forced into hiding after the sinister John Greer of Decima Technologies turned on a second powerful and all-knowing artificial intelligence-enabled machine known as Samaritan. At Comic Con executive producers Jonah Nolan and Greg Plageman, along with cast members Jim Caviezel, Michael Emerson, Kevin Chapman, Sarah Shahi, and Amy Acker, screened an extended clip (embedded after the break) featuring mostly new footage from the upcoming season that sheds a good amount of light on what’s coming next. Samaritan is hunting down the remaining members of Team Machine…The Machine continues to spit out numbers and while Reese is eager to continue their work, Finch knows their resources are severely limited…The Machine has helped Reese go undercover in law enforcement while ladies Shaw and Root now work at a posh department store (the panel’s crowd erupted in laughter at the sight of Shaw working her new job)…also, quick glimpses of Elias and Control hint at their return.

When asked what the theme of the new season will be Plageman answered “war.” It’s a battle between two AIs and our heroes are stuck in the middle with limited resources and no sanctuary (The Library was destroyed, remember?). It is key to note that Detective Fusco is not being flagged by Samaritan, and Plageman says this will allow for fun creative liberties. Also, Nolan briefly hinted that the two AIs might be upgraded with a voice some time in the future, but at the same time Plageman assured fans that they “always want to keep the technology grounded.”

Person of Interest returns Tuesday, Sept. 23 at 10PM on CBS.