John Wesley Shipp as Jay Garrick:
It is a retirated super-hero from the Justice Society is dedicated to sign autographs for fans at Comic-Con, will become the mentor of Barry Allen gets his powers after
Neil Patrick Harris as Barry Allen/The Flash:
It is a Central City detective who is investigating crimes caused by some strange costume types, but discovers that all are led by a mysterious boss called Grodd, superspeed powers obtained after a beam falls on it with a chemical becomes the Jay Garrick's successor after he gets his powers, receives training super hard to control your speed, then turned into the most important legacy of Flash
Kyle Gallner as Wally West:
Barry Allen's nephew who feels a great admiration for his uncle, which increases much more to discover that he is a superhero, so he decides to become his assistant to help as
Michael Clarke Duncan as Gorila Grodd (voice):
The greatest criminal mind of Central City, controls all the crime in the city from its cage at the zoo is the new attraction, but in the end its only purpose to conquer Central City, so recruits Trikster, Captain Boomerang, Captain Cold, Proffesor Zoom to make their plans
NOTABLE CAMEOS:
Ryan Reynolds as Hal Jordan/Green Lantern
Jim Parsons as Sheldon Cooper
Johnny Galecki as Leonard Hofstadter
Simon Helberg as Howard Wolowitz
Kunal Nayyar as Rajesh Koothrappali