<Tr> <Td_colspan="2"> Official website </Td> </Tr> <Tr> <Td_colspan="2"> Production website </Td> </Tr> <P> The Flash is an American superhero television series developed by Greg Berlanti, Andrew Kreisberg, and Geoff Johns, airing on The CW . It is based on the DC Comics character Barry Allen / Flash, a costumed superhero crime - fighter with the power to move at superhuman speeds . It is a spin - off from Arrow, existing in the same fictional universe . The series follows Allen, portrayed by Grant Gustin, a crime scene investigator who gains super-human speed, which he uses to fight criminals, including others who have also gained superhuman abilities . </P> <P> Initially envisioned as a backdoor pilot, the positive reception Gustin received during two appearances as Barry on Arrow led to executives choosing to develop a full pilot to make use of a larger budget and help flesh out Barry's world in more detail . Colleen Atwood, costume designer for Arrow, was brought in to design the Flash's suit . The creative team wanted to make sure that the Flash would resemble his comic book counterpart, and not simply be a poor imitation . The series is primarily filmed in Vancouver, British Columbia, Canada . </P>

Who plays the flash on the tv show