Amy Pietz joins the cast of The Flash Season 6 October 22, 2019November 23, 2021 hruwe TelevisionAmy Pietz The Flash, nationwide release and airing on The CW, 10/22/19. AMY PIETZ (BFA, Acting, ’91) joins the cast of Season 6 to play Debbie Dibny in Episode 3 “Dead Man Running” .