[2] The story was written by Gardner Fox under the editorial guidance of Julius Schwartz (whose subsequent autobiography was titled Man of Two Worlds), and illustrated by Carmine Infantino.

At a charity event organized by Iris West, Flash performs super-speed tricks to entertain the children there as the scheduled magician has not come.

Recreating a rope climbing trick, the Flash begins vibrating his molecules when he suddenly disappears from the stage.

On Barry Allen's world, the Golden Age Flash is thought to be a fictional comic book character.

Eventually, crossovers between the two Earths would become an annual feature in the Justice League of America comics, beginning with issue #21, "Crisis on Earth-One!"

Later in the same issue it becomes the location for the return of Barry Allen (the second Flash), for the first time since his apparent death in Crisis on Infinite Earths #8 (November 1985).

It is the comic book Sheldon loses in a cricket identification bet to Howard, and he can be seen holding it near the episode's conclusion.

It also contains a brief scene reminiscent of the cover, when the two Flashes run around opposite sides of a brick wall to check on a hostage after a fight with the criminal Sand Demon.