Good things come in threes.
At least, that seems to be the case for Danielle Panabaker in this exclusive sneak peek at the Feb. 15 episode of The Flash.
You already know her as Caitlin Snow and Killer Frost, but soon she'll be introducing a third Snow Sister into the mix with Khione, who Grant Gustin's Barry comes face-to-face with thanks to Mark (Jon Cor).
"Barry, do you remember the time you found out Caitlin was trying to bring back Frost, so you destroyed her lab?" Mark asks in the teaser for The CW show. "Point is, Caitlin never gave up. She kept on working with me. Together, we built a machine to reactivate Frost's mind in Caitlin's body."
Unfortunately, as Iris (Candice Patton) notes, something went wrong. The result: A brand-new character with blue streaks in her hair and no memory.
As it turns out, Khione's arrival has actually been in the works since as far back as season four.
"Khione was this idea that Caitlin and Frost's dad [Kyle Secor] had," Panabaker exclusively teased to E! News. "That's where the character actually comes from and that's where the name comes from—this was a seed that was planted way back in season four."
Panabaker continued, "That's something that [showrunner] Eric [Wallace] really prides himself on is all these little easter eggs that he leaves throughout the season."
See how Caitlin, Frost and Khione's stories overlap as The Flash takes its last lap, Wednesdays on The CW.