Reverse-Flash is a name used by several supervillains appearing in American comic books published by DC Comics. Each iteration of the character serves as a foil and an enemy of the Flash. Characters Edward Clariss Edward Clariss (also known as the Rival and the Rival Flash) first appeared in Flash Comics #104 (February 1949), and was created by John Broome and Joe Kubert. Publication history Edward Clariss first appeared in Jay Garrick's final appearance in Flash Comics #104 (February 1949), and was created by John Broome and Joe Kubert as an evil counterpart of Jay Garrick during the Golden Age of Comic Books. He would be revived by Geoff Johns and David Goyer in a story called "Injustice Be Done" from the Justice Society of America comic books through the Modern Age of Comic Books. Fictional character biography Although not called the Reverse-Flash, Dr. Edward Clariss was a professor at the university attended by the Golden Age Flash, and had recreated the formula which was behind Jay Garrick's speed. He hears Joan Williams (Garrick's girlfriend) talking about how the Flash's own speed was given to another student, which helped him develop the formula. Bitter at the scientific community's rejection of his claims, Clariss becomes a criminal. A darker version of the Flash with a mask over his head, he gives the formula to other criminals. The Rival's version of the formula is temporary, and he is captured and jailed (later stories have indicated a possible link between the Clariss formula and the Velocity 9 created by Vandal Savage, but thus far no such link has been conclusively proven). JSA #16 (November 2000) contains a flashback to a battle between the Rival and the Flash several months after the former's first appearance. Now that he has inexplicably regained super-speed, Clariss reaches light speed during the fight and vanishes into the Speed Force. After the Justice Society of America's reformation 50 years later, Johnny Sorrow retrieves Clariss from the Speed Force and invites him to join the Injustice Society. Driven insane in the Speed Force, the Rival races across the country on a killing spree. The Flash realizes that the Rival's path across the country spells out Clariss's name and the final murder victim will be Joan; Jay absorbs the Rival's speed before he can kill Joan. The Rival returns in Impulse #88 (September 2002), posing as Joan's doctor. Now pure speed