The CW has released a very short official description for the Tuesday, March 7 episode of The Flash.
The episode is called “The Wrath of Savitar” and here’s how they describe it:
SAVITAR VISITS WALLY – While training with Barry (Grant Gustin), Wally (Keiynan Lonsdale) starts to have visions of Savitar, which he hides from the team. A dangerous secret threatens Barry and Iris’ (Candice Patton) happiness. Alexandra LaRoche directed the episode written by Andrew Kreisberg & Andrew Wilder (FLA315). Original airdate 3/7/2017.