The Flash 4x18 "Lose Yourself" Season 4 Episode 18 Extended Promo - RALPH CONSIDERS CROSSING A LINE TO DEFEAT THE THINKER — When Barry (Grant Gustin) and Team Flash find a way to enter The Thinker’s lair, Ralph (guest star Hartley Sawyer) considers crossing a dangerous line to defeat DeVoe. Meanwhile, Joe (Jesse L. Martin) is concerned by Harry’s (Tom Cavanagh) recent behavior. Hanelle Culpepper directed the episode written by Jonathan Butler & Gabriel Garza (#418). Original airdate 4/17/2018. Subscribe to tvpromosdb on Youtube for more The Flash season 4 promos in HD! The Flash official website: http://www.cwtv.com/shows/the-flash/ Watch more The Flash Season 4 videos: https://www.youtube.com/playlist?list=PLfrisy2KXzkdp6FdF8E-t6ImHjqgDHZVz Like The Flash on Facebook: https://www.facebook.com/CWTheFlash Follow The Flash on Twitter: https://twitter.com/CW_TheFlash Follow The Flash on Instagram: https://www.instagram.com/CWTheFlash The Flash 4x18 Extended Promo/Preview "Lose Yourself" The Flash Season 4 Episode 18 Extended Promo The Flash 4x18 Extended Promo "Lose Yourself" (HD) » Watch The Flash Tuesdays at 8:00pm/7c on The CW » Starring: Grant Gustin, Candice Patton, Danielle Panabaker, Carlos Valdes, Tom Cavanagh Contribute subtitle translations for this video: https://www.youtube.com/timedtext_video?v=5XoFTKiIbf8