Variety ‘The Flash': Robbie Amell Cast as Firestorm set to join the cast of The CW's "The Flash" Variety "‘The Flash’: Robbie Amell Cast as Firestorm" Variety Variety Variety "‘The Flash’: Robbie Amell Cast as Firestorm" "‘The Flash’: Robbie Amell Cast as Firestorm" Variety "‘The Flash’: Robbie Amell Cast as Firestorm" Variety Variety Variety via Variety "‘The Flash’: Robbie Amell Cast as Firestorm" Variety Variety Variety "‘The Flash’: Robbie Amell Cast as Firestorm" Variety "‘The Flash’: Robbie Amell Cast as Firestorm" Variety Variety Variety “The Flash” casts Robbie Amell as Firestorm