One of the executive producers on "Person of Interest," Jonah Nolan, is feeling good about the show getting a fifth season. 

In an interview with The Hollywood Reporter, Nolan said he was "confident" it would be returning." 

 "CBS won't make any announcements for a while -- they've obviously got a ton of great shows, and they're trying to figure that out - but from our perspective, we're feeling very good about coming back," he said. 

Greg Plageman, who also serves as an executive producer on the show, gave a few details on where the story could lead in Season 5. Plageman said that the characters are going to have a lot of "rebuilding" to do. 

"They've been protected to this point by this all-seeing eye of the Machine, and they're now responsible for trying to rebuild that machine, so they're much more vulnerable than we've seen them before," Plageman said. "It's going to be a harrowing season." 

In Season 4, there was underlying premise about the war between the Machine and Samaritan being held on multiple levels, according to Entertainment Weekly.

But this war between the two Artificial Intelligence factions has been explosive throughout the season, just as teased at the end of Season 3. The war, although held on many fronts, has been both physical and mental. The parts that have played out on the surface between Elias and the Brotherhood attempts to sabotage certain plots and counter with preemptive strikes.

The finale, Episode 22 of Season 4 titled "YHWH," started out pretty much like it was left off from the previous episode. Reese, Fusco and Elias are still being held by Dominic. Dominic threatens to kill Harper and Elias unless Reese agrees to give him the same protections, proclaiming that the era of Elias is over and the there is a new world order.

Harold is now on-board with a meet and Dominic instructs his men to kill Harper and Elias, but The Machine gives Reese these omnipotent powers that takes out the entire room. Fusco busts in with the cavalry before Dominic and Elias have a chance to escape.

This concludes the Elias and Brotherhood issue, but there is still a greater matter to handle, the issue that has given this season most of its momentum. Reese quickly sets out to find Root and Finch. They are still on their quest to save The Machine, given that the Samaritan has procured his location after threatening to kill Finch and Root in the previous episode.

Samaritan had been attacking the power grid in an attempt to weaken it and Root believes The Machine is dying. They have made their way across the city to gather up technical components necessary to save its life, which includes some RAM and a compression algorithm from Caleb.

Reese catches up with them at a Brooklyn power station. The Machine has hidden itself in the power grid, and in order to save it, they have downloaded critical information necessary for rebuilding once it has been captured or destroyed. The Machine once again gives Reese the necessary power to take out Samaritan operatives that have converged on the station.

The Machine has a somewhat touching moment with its creator Finch, who has had doubts about its ominous objectives. But those doubts are cast aside when the dying Machine reveals that it went into hiding to protect itself and the team. Finch says he cannot let it die in an emotional scene between man and machine, father and son.

We learn that the difference between The Machine and Samaritan is The Machine believes that people should have the right to choose, and Samaritan believes that people are inherently evil and must take a firm hand in controlling them. 

The episode concludes with Finch, Root and Reese walking away with a briefcase that contains the downloaded core data. Their defeat is overshadowed by hope as they retreat, with the ability to rebuild it.

You can watch the episode on CBS if you have not had a chance to yet.