"Person of Interest" season 4 spoilers hinted of a coming war that will descend upon the characters, as castJim Caviezel revealed that he has more fun with the series.

The producers and cast of the show revealed "Person of Interest" season 4 spoilers during the San Diego Comic-Con Q&A.

"This season is about war. There's another machine in charge, and I think all of our guys will find themselves severely challenged," showrunner Greg Plageman said at the Comic-Con panel, according to Zap2it blog.

Cast Sarah Shahi, who plays Sameen Shaw, quipped: "Before the show I lived in my very happy pink bubble, which consisted of frozen yogurt and babies. Now I'm just all screwy in the head. Yeah, it's really done a number on me."

"Person of Interest" season 4 cast Jim Caviezel also answered the question of a young fan who asked whether he has fun filming the series.

"This one is a little more funner, by this much, because we get to shoot guns a lot," he then asked about the fan's age before adding, "You're the same age as my daughter, and you're beautiful," before going over to the fan to give her a big hug.

Earlier, "Person of Interest" season 4 spoilers revealed that Cara Buono will play a recurring character as a femme fatale, according to Deadline.

"Buono's character is said to be uniquely qualified to navigate next season's 'new world order,' in which Samaritan is online and all-seeing, forcing Reese, Finch and the rest of Team Machine to lay low using unimpeachable aliases," the description said.

Showrunner Greg Plageman also revealed that fans would be "pleasantly surprised" by Cara Buono's character.

The website added more "Person of Interest" season 4 spoilers when it said that the premiere season will pick up a month-and-a-half after the season 3 finale.