"Criminal Minds" season 10 spoilers hint of the new dynamics to the BAU team with the arrival of Jennifer Love Hewitt's Kate Callahan, as one of the series' episodes will tackle Morgellons disease.

Showrunner Erica Messer teased "Criminal Minds" season 10 spoilers to TVLine as she said that Kate Callahan will bring fresh perspective into the BAU.

"You see her doing something you don't see our team ever doing. [She has to] sit there and pretend to like a criminal," she said.

Earlier "Criminal Minds" season 10 spoilers by TVGuide dished out more information about Jennifer Love Hewitt's character.

"Kate is smart, charming, and wise for her years. Her background is criminal psychology, and her passion comes from wanting to make the world a safe place. She's had a lot of personal loss that makes her a patriot and a nurturing figure to those in her personal and work families," she said.

Meanwhile, Erica Messer revealed more "Criminal Minds" season 10 spoilers as she claimed that Garcia and Reid are traumatized by the shooting at the season 9 finale even if they didn't let on at the beginning. The two characters will reportedly suffer from post-traumatic syndrome disorder and will exhibit the symptoms during the initial episodes.

But the show is not just about action as the showrunner teased some romance. "We need to figure out a few things with Morgan's girlfriend [Savannah] and Hotch's girlfriend [Beth] and see how we'll explore those stories this year," according to theTVLine report.

The series will also deal this season the Morgellons disease after the casting of Alicia Coppola, last seen in "Jericho" as Lisa Randall, described as the head of the support group of Morgellons sufferers. However, Coppola's character can turn dark since unlike other support groups, she is "wiling to go as far as she can to protect the group members privacy," said TVLine.