After being introduced in season 2 ofthe Grant Gustin ledtelevision drama is moving full steam ahead with a bevy of recent casting announcements. Recently, Digital Spy caught up with Greg Berlanti to discuss the show and how it compares to The CW's other superhero drama. "Barry (Grant Gustin) is different from Oliver (Stephen Amell)," began Berlanti. He continued, ""He's a man of science and has more of a sci-fi bent, whereas Arrow has a bit more of a crime bent. We often talk about how Oliver comes off like a pessimist, but deep down he's an optimist and has hope. Barry lost his mother at a very young age, his father was sent to prison for murdering his mom, he went through a lot of stuff - on the surface he's bubbly and upbeat and seems like an optimist, but deep down maybe there's no hope left."And similar to how the island of Lian Yu is central to a lot of Arrow's storylines and side-stories; so too will the particle accelerator accident that gave Bary Allen his powers serve as a central element of the Flash show. We've talked a lot on Arrow about the particle collider and Harrison Wells and S.T.A.R. Labs and so you'll see S.T.A.R. Labs as an active part of the show," said Berlanti.