"Person of Interest" season 4 spoilers won't be revealed until late this month as cast Sarah Shahi confessed that filming the series was very hard.

The HollywoodHills website reported that "Person of Interest" season 4 spoilers could be announced in late July as the series will jet off to the San Diego Comic-Con in San Diego, California on July 26.

The show will be represented by executive producer Greg Plageman and some of the show's stars who will reveal details on what fans can expect for the fourth season during the special Q&A session.

While cast Sarah Shahi (Sameen Shaw) did not reveal "Person of Interest" season 4 spoilers, she did weigh in on the marathon shoots for the show, explaining that the hardest thing about doing a network show is that it's filming everyday for 16 hours for nine months.

"I talked to Tony Shaloub once about it and he said it's like being in a factory, just churning out this product," she added. "He said you've got to keep your head down and keep running, and every once in a while you can bring your head up for air, but not too long, because then you've got to right back down again."

Earlier, executive producer Jonathan Nolan dished out "Person of Interest" season 4 spoilers to TVGuide as he said:

"Now that our heroes have ​assumed fake identities and ​gone into hiding, they'll have to get real jobs," he said. "Now you've got to be Clark Kent - you've got to be the regular guy."

"Shaw's going to have a day job and co-workers, and so are Reese and Finch. That can be great fun and is also a grounded aspect of the show versus this titanic battle taking place around them," he added.

However, they won't be hiding for long as Jonathan Nolan said: "Our Machine's in a lot of trouble. Samaritan's the bigger, tougher kid on the block. Root is going to be key to keeping our team alive and focusing on the question of how they put the genie back in the bottle."