Barry Allen, also known by his alter ego The Flash, is a fictional character in The CW's Arrowverse franchise, first introduced in the 2013 episode "The Scientist" of the television series Arrow, and later starring in The Flash. The character is based on the DC Comics character of the same name, created by Robert Kanigher and Carmine Infantino and was adapted for television in 2013 by Greg Berlanti, Andrew Kreisberg and Geoff Johns. Grant Gustin portrayed Barry Allen, with Logan Williams and Liam Hughes portraying younger versions.
Grant Gustin as Barry Allen in The Flash
The Arrowverse is an American superhero media franchise and shared universe that is centered on various interconnected television series based on DC Comics superhero characters, primarily airing on The CW as well as web series on CW Seed. The series were developed by Greg Berlanti, Marc Guggenheim, Andrew Kreisberg, Geoff Johns, Ali Adler, Phil Klemmer, Salim Akil, and Caroline Dries. Set in a shared fictional multiverse much like the DC Universe and DC Multiverse in comic books, it was established by crossing over common plot elements, settings, cast and characters that span six live-action television series and two animated series.
Promotional image for the 2016–17 television season