Barry will discover the hideout of Doctor Alchemy in the upcoming episode of "The Flash."

Titled "Shade," episode 6 follows Barry and Doctor Alchemy as they come face to face with each other again. In the trailer for the episode, the two are shown facing each other again, but this time in the very hideout of the masked villain.

The preview does not exactly reveal how Barry will discover the hideout of Doctor Alchemy, but promotional photos for the upcoming episode suggest that the Scarlet Speedster will learn where he is hiding while looking for the whereabouts of Wally.

In the preview clip, Wally is shown having visions about being the Kid Flash, indicating that it's just a matter of time before the villain lures him to his hideout and grants him super speed.

The previous episodes of the current installment revealed that Doctor Alchemy actually has the ability to transform everyone who has powers in the Flashpoint timeline into a metahuman. However, the process through which he carries out this transformation has yet to be revealed in the future episodes of the series.

It may be recalled that Edward Clariss and Frankie Kane were the first to be given powers by Doctor Alchemy, in which Edward became the villainous speedster "The Rival" while Frankie turned into Magneto-like metahuman, "Magenta."

Wally mentioned in episode 3 to Jesse about his dream of becoming a speedster. Given the preview for episode 6, it has become clearer that Doctor Alchemy was already trying to connect to him as early as then.

"The Flash" season 3, episode 6 airs on Nov. 15, 8:00 P.M. on The CW.