Flash [Barry Allen]; Dr. Alchemy [Alvin Desmond] (also in flashback to birth, childhood and criminal life); Captain Darryl Frye; Fiona Webb; Rita Desmond (in flashback); Mr. Element [Albert Desmond] (also in flashback to birth, childhood); Troy Nathan; Mack Nathan; Chuck; Mr. and Mrs. Herman Desmond (in flashback, Alvin's parents); Mr. and Mrs. Herbert Desmond (in flashback, Albert's parents)
Synopsis
Flash faces the new Dr. Alchemy and his attack on S.T.A.R. Labs, while Albert Desmond learns of his psychic twin, Alvin, and decides to take up arms against the evil Dr. Alchemy the best way he knows how.