It seems that the casting process for CW's Flash spin-off is well underway now. In the same week that Jesse L. Martin was announced as Detective West , two new cast members have been announced.

Rick Cosnett and Danielle Panabaker

Deadline reports that The Vampire Diaries' Rick Cosnett and Necessary Roughness' Danielle Panabaker are joining the show's cast. Cosnett will play Eddie Thawne, a detective recently transferred to Central City who carries a dark, mysterious secret. Panabaker is Caitlin Snow, a genius bioengineer who lost her fiancé to an explosion at S.T.A.R. Labs.Notably, both of these characters are ultimately villains from DC's comic book universe. Caitlin Snow is the name of the New 52's incarnation of the supervillain Killer Frost, while Eddie Thawne sounds a lot like Eobard Thawne, the man who becomes Professor Zoom, a.k.a. the Reverse Flash.Looks like Grant Gustin's Flash already has his work cut out for him.