Glee’s Grant Gustin has landed the role of Flash alter ego Barry Allen, who will appear on Arrow before possibly heading up his own spin-off.
In the world of Arrow, Barry is a Central City assistant police forensic investigator who arrives in Starling to look into a series of unexplained robberies that may have a connection to a tragedy in his past. A comic book fan boy, Barry is obsessed with the Arrow but unaware that working with Oliver and Felicity to solve the crime has brought him right into the dangerous world of the vigilante.
Barry will first appear in Episodes 8 and 9 of the second season of Arrow before the backdoor pilot for the potential spin-off airs as Episode 20, all of which will be written by Arrow executive producers Greg Berlanti and Andrew Kreisberg as well as DC Entertainment’s Geoff Johns. The first two episodes will bring Barry to Starling City, while the latter will be a bigger introduction into the world of Flash.
Source: TV Guide