Over the summer, it was announced that Kid Flash/Wally West would return to The Flash and that his return would involve him helping Barry Allen take down one of his greatest enemies. While the villain's name has yet to be revealed, showrunner Eric Wallace has gone into more detail regarding Wally's return.
While teasing what's to come for Team Flash in Season 6, Wallace said of Wally, "But if all goes well, I’m trying my best to… get Kid Flash in for a couple [of episodes] because the story’s so good… Kid Flash will now meet a classic villain from the classic days from classic comic books. And maybe he’ll have to save the Flash’s behind, which is what I want to see, because maybe he’s not a kid anymore. It’s time to grow up."
As Season 6 is divided into "chapters" containing separate storylines, it's not clear when, exactly, Wally will make his return.
Airing Tuesdays at 8 p.m. on The CW, The Flash stars Grant Gustin, Candice Patton, Carlos Valdes, Danielle Panabaker, Tom Cavanagh, Jesse L. Martin, Danielle Nicolet and Hartley Sawyer.