The Flash disappears while giving an exhibition of his super speed, He finds that he has inadvertently vibrated into the Earth of another dimension which seems to be a near copy of his own world. Here, he meets the Flash of that world, Jay Garrick.; Grodd uses his evolution-accelerator to change into a human being - Drew Drowden, he then plots to rule the world!; Petty crook, "Digger" Harkness becomes "Captain Boomerang" in order to publicise the Wiggins Game Company's new product, he does however, have his own plans - as a super criminal.; As Mr. Element, Al Desmond nearly defeated the Scarlet Speedster with his mastery of elements. Newly armed with his "philosopher's stone," he re-emerges as Dr. Alchemy; The Flash encounters a bizarre super villain who utilises sound as a weapon of crime - The Pied Piper.