The upcoming "Arrow" spin-off series "The Flash" isn't holding back on the DC Universe villains with two of the superhero's enemies already cast.
Danielle Panabaker ("The Crazies," "Friday the 13th") plays Caitlin Snow, a bioengineering expert who lost her fiancé during an explosion at S.T.A.R. Labs. In the comics, Snow becomes Killer Frost after a lab accident and must kill to feed on body warmth.
The other casting is Rick Cosnett ("The Vampire Diaries") as Detective Eddie Thawne, a new transfer to the Central City Police Department. In the comics, he replicates the accident that gave Barry Allen his powers and in the process becomes Professor Zoom (aka. 'Reverse-Flash').
Both characters are set to appear in the upcoming pilot episode for the CW series which stars Grant Gustin as Allen. While the show is only getting a pilot at present, there's serious indication The CW is already considering a series pick-up in time for this Fall.