 The second time is in the episode "Flash and Substance", where Wally is shown to be working at the forensics lab before taking a half day off to attend the Flash museum opening.Wally's face is also exposed in one other episode, "The Great Brain Robbery".When his mind is switched with Lex Luthor's, Lex removes the mask to see if he can at least "figure out" who the Flash really is by looking at his face in the bathroom mirror, only to state in an annoyed tone, "I have no idea who this is", although the costume is still kept.