After the "Rogue Air" episode of The Flash, The CW released a sneak preview of next week's episode, which is called "Fast Enough."
In "Fast Enough," Wells (Tom Cavanagh) presents Barry (Grant Gustin) with a life-changing choice. Dr. Martin Stein (guest star Victor Garber) and Ronnie Raymond (guest star Robbie Amell) return to help the S.T.A.R. Labs team with this final fight.
The "Fast Enough" episode of The Flash is directed by Dermott Downs with story by Greg Berlanti & Andrew Kreisberg and teleplay by Gabrielle Stanton & Andrew Kreisberg. The "Fast Enough" episode of The Flash airs on Tuesday, May 19, 2015 at 8 PM ET on The CW.