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The Flash is an American television series developed by Greg Berlanti, Andrew Kreisberg, and Geoff Johns, based on the DC Comics character the Flash. The series premiered on The CW television network in the United States on October 7, 2014, and ran for nine seasons until May 24, 2023. The series is a spin-off from Arrow, and set in the same fictional universe.
The following is a list of characters who have appeared in the series. Many of the characters appearing in the series are based on DC Comics characters.