 Wally in the comics is an auto mechanic).The importance of the Flash as the "heart" of the Justice League was shown in the episode "A Better World", when his death in an alternate timeline triggered a series of events which turned that alternate League (the "Justice Lords") into virtual dictators of Earth.He has also proven key in saving the day in a few episodes, such as "Divided We Fall", where he defeated the fused Brainiac/Lex Luthor when the other six founding Justice League members could not.