Former 'Alias' star Victor Garber has been cast as a recurring character for 'The Flash' on The CW. He will portray Dr. Martin Stein, the other half of Firestorm, joining with Ronnie Raymond (Robbie Amell.) Stein is a genius nuclear physicist who becomes fused with Raymond to become Firestorm. 

CW's 'The Flash' stars Grant Gustin as Barry Allen/The Flash, Candice Patton as Iris West, Jesse L. Martin as Iris’s father, Detective West, Danielle Panabaker as Dr. Caitlin Snow, Carlos Valdes as Cisco Ramon, Tom Cavanagh as Dr. Harrison Wells, and Rick Cosnett as Eddie Thawne. Guest stars this season include Chad Rook as Clyde Mardon aka Weather Wizard, Wentworth Miller as Leonard Snart aka Captain Cold, William Sadler as Simon Stagg, Robbie Amell as Ronnie Raymond aka Firestorm, Kelly Frye as Bette Sans Souci aka Plastique, Clancy Brown as General Wade Eiling, Greg Finley as Tony Woodward aka Girder, Robert Knepper as William Tockman aka The Clock King and Dominic Purcell as Mick Roray aka Heat Wave.