Take a look @ footage, images and synopsis from "The Flash" episode "The Wrath of Savitar", written by Andrew Kreisberg, Andrew Wilder and directed by Alexandra La Roche, airing March 7, 2017 on The CW:
"...while training with 'Barry' (Grant Gustin), 'Wally' (Keiynan Lonsdale) starts to have visions of 'Savitar', which he hides from the team.
"Then a dangerous secret threatens the happiness of Barry and 'Iris' (Candice Patton)..."
Click the images to enlarge and Sneak Peek "The Flash: The Wrath of Savitar"...