Warning: The following contains SPOILERS for The Flash season 8 finale.
The finale of The Flash season 8 was full of surprises, but the most stunning of them all was a potential setup for Danielle Panabaker to leave the long-running superhero series and for Frost to return played by another actor. Panabaker has been a regular member of the ensemble of The Flash since the beginning, playing both Dr. Caitlin Snow and her ice-powered doppelganger Frost. However, with Panabaker having yet to sign on for The Flash season 9, it seems that the show's writers found a way to continue the story of the Snow sisters even if Panabaker decides to leave the series.
The story of The Flash season 8 found both Caitlin and Frost adjusting to life apart, after having spent several years sharing the same body. Frost sacrificed herself to save Caitlin and the world after Caitlin accidentally empowered a cosmic being dubbed Deathstorm with her efforts to resurrect her deceased husband, Ronnie Raymond. This led to an unlikely alliance between Caitlin and Frost's boyfriend, reformed thief Mark «Chillblaine» Blaine, as the two worked together to find a way to bring Frost back from the dead.
Related: The Flash Season 8 Post-Credits Scene Explained: Who It Sets Up
The finale of The Flash season 8 showed the fruits of their labor, as Chillblaine worked to save Caitlin after something went wrong with the cryo-chamber he had built to revive Frost's personality from within Caitlin's body. The penultimate scene of the episode showed the chamber opening, as a confused Chillblaine asked the person in the pod who they were. The figure answered, in Caitlin's voice, "A friend, I think." It was clear from Chillblaine's reaction that he had been expecting to
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