'The Flash' season 3 episode 7 spoilers: Killer Frost battles with Flash; 'huge' four-way crossover with The CW's superhero shows teased

Caitlin (Danielle Panabaker) finally unleashes her inner Killer Frost in the upcoming episode of "The Flash" season 3.

In the episode airing next week, Caitlin uses her powers to save Barry (Grant Gustin). Unfortunately, as her mother predicted, Caitlin's effort unleashed her inner Killer Frost. She goes on a rampage while searching for Dr. Alchemy, leading the Flash and  Vibe (Carlos Valdes) to team up and fight against her. Elsewhere, Joe (Jesse L. Martin) and H.R. (Tom Cavanagh) sit down and have a heart to heart conversation.

Speaking with Collider, Panabaker revealed that the next two episodes will see Caitlin's transformation to Killer Frost. However, she won't beletting the team know about her secret anytime soon. "I think she doesn't understand it," Panabaker explained. "I think that conversation would be a little bit difficult, like, 'Hey guys, I don't have any answers, but here you go,' especially for Caitlin as a scientist and someone who is focused on always having the answers. She wants to get this figured out for herself before she comes to the team with her request for them, etc."

On another note, there are only two weeks before The CW's much-anticipated four-way crossover episode titled "Invasion!" Characters from "The Flash" will certainly be a part of it, and actor Keiynan Lonsdale recently shared his thoughts on the upcoming crossover.

The actor admitted that he felt very excited when he received the script. "I think that's definitely something that my inner child is like, 'Oh, what do I get to do? Do I get to do some cool, crazy stuff?" he told Comicbook.com. "This crossover is huge. There's so many players in it and I think that was the most exciting thing, was seeing so many teams and players come together and collide in a sense."

"The Flash" season 3 airs every Tuesday night at 8 p.m. ET on The CW.