Zoom will first appear to challenge The Flash (Grant Gustin) in the second episode of the season, “The Flash of Two Worlds.” “Last year, with the Reverse-Flash, we just modulated Tom Cavanagh’s voice, ...

Later called simply the Rival, he was the first villainous speedster who held a candle to the Fastest Man Alive. But when the Flash was rebooted during the Silver Age, with Barry Allen deemed the new ...