REACTION to The Flash 3x19 Promo "The Once and Future Flash" (HD) Season 3 Episode 19 Promo HD

- REACTION to The Flash 3x19 Promo "The Once and Future Flash" (HD) Season 3 Episode 19 Promo - REACTION to The Flash 3x19 Promo "The Once and Future Flash" (HD) - The Flash 3x19 Promo "The Once and Future Flash" (HD) LINK - https://www.youtube.com/watch?v=_ueiXSCIS0s Synopsis: Barry goes into the future to get more information on Savitar.