"Criminal Minds" season 10 spoilers reveal more guest stars to test the dynamic of the new BAU team as a leaked script by the network gives away a new character.

The TVLine revealed "Criminal Minds" season 10 spoilers when it reported thatAlicia Coppola ("Jericho") is added to the cast as a guest.

She will play Lisa Randall, the head of a support group with Morgellon's syndrome who is willing "to go as far as she can to protect group members privacy."

Meanwhile, the Twitter account revealed "Criminal Minds" season 10 spoilers when the producers leaked a dialogue from episode 4 called "The Itch," which hinted of a new character.

The photo showed a part of the script, which revealed the conversation between Derek Morgan and Doug Adams. "Morgan: That shirt you're wearing is a fly shirt. [Or whatever awesome saying Shemar comes up with that doesn't sound like a white, nerdy writer wrote it]," the script said.

The Twitter image was captioned, "Page 9 from #CriminalMinda EP10x04 The Itch.: #tablereadfunnies #breenfrazier."

When the show returns, it's going to be a different BAU team following the addition of Jennifer Love Hewitt's Kate Callahan.

Executive producer Erica Messer dished out "Criminal Minds" season 10 spoilers to TVGuide when she explained 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.

Kate Callahan is also a veteran of the FBI for eight years. Not only that, she's also familiar and friends with some members of the BAU team so her transition would not be difficult. As the showrunner noted,

"The rapport feels like friends catching up. If feels like she's always been here."