Jump on the Cosmic Treadmill and discover the untold origin of Reverse-Flash! Who is he, and what is his relationship to Barry Allen? Secrets are revealed and questions answered as DC Comics races through the history of Reverse-Flash. Starting with the very first appearance of Reverse-Flash that happened in 1963! Then stretching forward to the present day for the storyline ""The Button,"" in which a bloodstained smiley button is embedded in the Batcave wall.