Entertainment TV 'The Flash' Star Grant Gustin Loses Race with Brandon Routh's Son on Set The Flash season 3 premieres Oct. 4 at 8 p.m. ET on The CW By Nick Romano Nick Romano Twitter Nick is an entertainment journalist based in New York, NY. If you like pugs and the occasional blurry photo of an action figure, follow him on Twitter @NickARomano. People Editorial Guidelines Published on August 29, 2016 02:25 PM Share Tweet Pin Email A version of this article originally appeared on EW.com. The Flash may be the fastest man alive, but Grant Gustin still has a ways to go. The star of The CW’s DC series adorably raced and lost to Leo, the son of The Atom actor Brandon Routh. “Leo beat me in a race today. I wasn’t ready,” Gustin wrote next to video of the moment on social media. Routh, who also played the Man of Steel in Bryan Singer’s Superman Returns, responded, “When your dad is #Superman & #TheAtom, but you heart #TheFlash…HUGE props to the crazy talented and genuinely kind [Grant Gustin] for being such a great sport!” Gustin, 26, previously posted photos from the Flash set of script pages for the fifth episode of season 3 and his “very busy day” wearing Ray-Bans. “This is my version of the goggled Batfleck look,” he wrote. The Flash season 3 premieres Oct. 4 at 8 p.m. ET on The CW.