Caitlin Snow

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Name: Dr. Caitlin Snow
Occupation: supervillain, scientist;
Bioengineer of S.T.A.R. Labs (Arrow/Flash)
Title/Rank: Killer Frost
Status: Alive
Relationships: Comics: Firestorm (enemy);
Arrow/Flash: Dr. Carla Tannhauser (mother), Ronnie Raymond (husband);
Cisco Ramon (friend/colleague), Barry Allen (colleague/friend), Harrison Wells (boss), Felicity Smoak (friend/ally),), Wally West (ally), "Jay Garrick" aka Zoom (love interest/enemy), Julian Albert (love interest), Jesse Wells (ally)
Fandom: DC Comics, Firestorm, Arrow/The Flash (CW)/Legends of Tomorrow (Arrowverse), DC Super Hero Girls, Justice League Action
Other: Portrayed by Danielle Panabaker
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Caitlin Snow, aka Killer Frost, is a DC Comics character under the Firestorm title. She also appears as a main character in the new The Flash television series.


Caitlin first appeared on Fury of Firestorm: The Nuclear Men #19 (June 2013).


In DC Rebirth, Caitlin/Killer Frost joins the Suicide Squad team. She helps the Suicide Squad in their fight against the Justice League, but subsequently assists them against Maxwell Lord when he is possessed by Eclipso. Due to this, Amanda Waller releases her in Batman's custody. She then joined the new Justice League of America made up of Batman, the Atom, Lobo, Black Canary, Vixen, and the Ray.


Caitlin first appeared on an episode of Arrow[1], with Cisco to pack away STAR lab warehouse in Starling City. They are both targeted by Deathstroke, but manage to get away. It's later revealed that she and Cisco befriended Felicity Smoak during one of her trips to see a comatose Barry Allen. Felicity met the two of them with a vial of Mirakuru in order to get them to create a cure.

DC Super Hero Girls

Caitlin Snow's version of Killer Frost appears in DC Super Hero Girls is a hero under the name "Frost" and a student in Super Hero High.

Justice League Action


On April 24, 2017 Killer Frost trended during a live airing of The Flash along with the official Flash tag.



Prior to the release of the pilot and after the release of the The Flash's trailer, the fanon pairing of Caitlin/Barry took off in a big way. After the release of the pilot, the pairing is still quite popular although there are few fans that are interested in seeing Caitlin/Cisco and Caitlin/Harrison. The canon pairing Caitlin/Ronnie took off after the release of photos of Caitlin and Ronnie together for episode 3. Since Felicity Smoak appeared on Flash and her scenes with Caitlin, the gen pairing of Caitlin & Felicity started appearing mainly appearing on Tumblr in forms of gifs and picspams but also some fanfiction.

Season 2 introduced the pairing Caitlin/Jay Garrick. Much to the excitement of MANY fans, Season 2 also introduced Killer Frost (well, Earth-2 version). Season 3 officially introduced Earth-1's version of Killer Frost and introduced the pairing of Caitlin/Julian.

Other rarepairs include: Caitlin/Iris, Caitlin/Joe, Caitlin/Lisa, Caitlin/Leonard, Caitlin/Mick.






Archives & Fannish Links

Tumblr Fandom

Twitter Fandom


  • Fan Forum Appreciation Posts of Caitlin Snow/Danielle Panabaker: 1 2 3 4 5



  1. Arrow Season 2 Episode 19 "The Man Under the Hood"