On the next episode of "The Flash," Wally (Keiynan Lonsdale) starts having dreams about being the Kid Flash, and Barry (Grant Gustin) thinks he should tell Wally, Iris (Candice Patton), and Joe (Jesse L. Martin) about what happened in the alternate timeline. Season 3 episode 6 is titled "Shade."

As viewers would recall in "Flashpoint," Wally has become the Kid Flash as Barry's speedster alter ego is slowly being erased from existence. However, toward the end, Wally the Kid Flash dies during a battle with another speedster. Barry's return to the original timeline did not restore everything to the way they were, but characters from "Flashpoint" have begun to appear.

The extended trailer shows Wally seemingly having a nightmare then Barry is shown talking to the team about what those dreams mean. He says, "Wally has been having dreams about being a speedster... memories of that life."

Joe is the one who tells Wally about those dreams that are actually memories, as he says, "Now you're getting powers." It also appears that Wally would be using his power in order to be helpful to the team. It also looks like Alchemy could have something to do with the traces of memories haunting Wally.

A scene shows Wally inside the S.T.A.R. labs prison facility for metahumans and he writes the name Alchemy. Then his voice is heard saying, "He's in my head." A physical fight is also teased between the West siblings.

Alchemy has been revealed to be the current season's main villain. His identity has not yet been revealed, but he will come face-to-face with Flash again in the upcoming episode. It has been known that he has the power to enable metahuman powers and he may have something to do with Caitlin's (Danielle Panabaker) surfacing ability as well.

"The Flash" season 3 airs Tuesdays at 8 p.m. on The CW network, but the upcoming episode will not air this week but on Nov. 15.