Glee's Grant Gustin has just landed the role of Barry Allen (The Flash) in the upcoming season of CW's Arrow.

Not only will Gustin appear in multiple episodes of Arrow,  but Episode 20 of the second season will serve as a backdoor pilot for a potential spin-off for The Flash.

The episodes where Barry Allen (The Flash) will appear in Arrow will be written by show co-creators Greg Berlanti and Andrew Kreisberg as well as DC Entertainment’s Geoff Johns.

“When we first meet Barry Allen, he’s just a forensic scientist … an ordinary man,” Kreisberg told reporters in July when the project was first announced. The character, like Amell’s vigilante, will be grounded in reality and as realistic as possible. The first two episodes will see the character in Queen’s home of Starling City, with the 20th providing a window to see Barry in The Flash’s world.

Barry Allen is described 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 unaware that working with Oliver and Felicity to solve the crime has brought him right into the dangerous world of the vigilante.

“Part of the fun for the audience … is to see how we view our Arrow take on the Flash legacy,” Kreisberg said. “Some of it will feel very familiar to DC Comics, some of it hopefully will feel different, fresh and exciting. The same way we approached Arrow is the same way we’re approaching Barry.”

Arrow will be back on The CW on October 9, 2013.

Source: TVGuide.com