The Flash series is a spin off of the Arrow series. I haven't had a chance to watch Arrow but from the buzz it's getting, who knows I might start to watch it. Anyway, the Flash is one of the prominent DC super heroes and definitely has a cool super power that can make good stories. The last Flash series in the 90's wasn't that bad either. I watched them on DVD. It's definitely time for an update. Here's a behind the scene look.
You can get the previous Flash series DVD from Amazon here.