Watch The Flash season one finale above for "Fast Enough."
Updated: with trailer below.
The Flash airs Tuesdays at 8pm ET on the CW.
The Flash 1x23 "Fast Enough" - EPIC SEASON FINALE; VICTOR GARBER AND ROBBIE AMELL GUEST STAR - 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. Dermott Downs directed the episode with story by Greg Berlanti & Andrew Kreisberg and teleplay by Gabrielle Stanton & Andrew Kreisberg (#123).