powers or her transformations will become irreversible. However, Catlin's abilities fully manifest when Albert removes her power-suppressing necklace so she can use her healing abilities to save herself, triggering her transformation into Killer Frost. Joining Savitar as his enforcer, Killer Frost battles Team Flash Albert gives her a cure he developed. She subsequently turns on Savitar and helps her friends defeat him before leaving to rediscover herself. In the fourth season, Caitlin and Killer Frost develop a "Jekyll and Hyde"-esque relationship while the latter works to reconcile her dual personalities, giving herself the ability to switch between her two personas at will. Furthermore, Killer Frost begins to show a more heroic side and agrees to use her powers to help Team Flash. Later in the season, Caitlin discovers her powers and Killer Frost originated during her childhood and that she suppressed the memories. In the fifth season, Caitlin discovers further that her father, Thomas Snow, experimented on her and himself in an attempt to cure their ALS genes, resulting in them both developing alternate personalities with cryokinetic powers. After he becomes Icicle, Caitlin and Killer Frost work together to save Thomas from his evil persona. In the sixth season, Caitlin experiments with giving Frost more time with their shared body and allowing her to live her own life. In the seventh season, they become exposed to Eva McCulloch / Mirror Monarch's rays, which severs their telepathic connection and causes Frost's cells to replicate until she acquires her own body. As such, Caitlin and Frost decide to live separate lives as twin sisters. In the eighth season, Killer Frost transforms into "Hellfrost" and gives her life to defeat Deathstorm. Having secretly taken a hair sample from Frost, Caitlin tries to resurrect her with Chillblaine's help by entering the Consciousness Resurrection Chamber (CRC), but the machine malfunctions, causing a new individual named Khione (also portrayed by Panabaker) to emerge in the ninth season. Film The Louise Lincoln incarnation of Killer Frost appears in Superman/Batman: Public Enemies, voiced again by an uncredited Jennifer Hale. This version is a member of the "Cold Warriors". The Louise Lincoln incarnation of Killer Frost appears in Batman: Assault on Arkham, voiced again by Jennifer Hale. She is recruited by Amanda Waller to join the Suicide Squad and break into Arkham Asylum to retrieve data stolen by the Riddler, though Waller secretly assigns Killer Frost to kill him.