Caitlin’s (Danielle Panabaker) greatest fear is going to happen in next week’s episode of “The Flash.”

In the trailer for Season 3, Episode 7, Caitlin’s inner Killer Frost completely takes over her consciousness, causing her to do terrible things she doesn’t really mean. For instance, Caitlin throws icicles at her friend Cisco (Carlos Valdes), who is left with no choice but to use his own metahuman powers against her.

According to the synopsis for the episode, Caitlin also kidnaps Julian (Tom Felton), who she ends up hurting in the trailer.

“Your friend, she’s a meta. [But] not one of the friendly ones,” Julian tells Barry. When Barry seems to defend Caitlin from his fellow CSI, Julian furiously calls her a “bloody menace” and shows Barry the arm injury he gets  from his recent encounter with her.

Despite all the troubles that Caitlin brings, Barry refuses to fight her. “I’m not gonna fight you,” Barry tells Caitlin, who becomes obviously mad at him for altering the timeline.

“You keep messing with everyone’s lives,” Caitlin tells Barry. “You did this to me! You make me cold, Barry.”

While the version of Caitlin seen in the trailer is upset with  Barry for creating the Flashpoint timeline, Panabaker told Entertainment Weekly last month that she doesn’t think her character is really angry at Barry.

“This is her reality,” the 29-year-old actress said of the altered original timeline. “After learning about Flashpoint and that Barry did run back in time, that’s new information, but that’s not the foundation of who she is and her life experience. This is her life, these are the cards she was dealt. Does she wish it was something different? Probably, but I don’t think she’s angry at Barry for doing this.”

“The Flash” Season 3, Episode 7 airs on Tuesday, Nov. 22, at 8 p.m. on The CW.