Professor Zoom

Professor Zoom, also known as Reverse-Flash is the arch-nemesis of the Flash - a sociopathic criminal with a brilliant mind and super-speed. He traveled through time to do battle with the Flash Family. He has also been a member of the Secret Society of Super-Villains.

Eobard Thawne was born in the 25th Century and used to idolize the second Flash - Barry Allen. He went so far as to undergo an operation to make himself like Barry. When he used the Cosmic Treadmill to go back to the 20th century, he miscalculated, arriving after seeing his hero had already died and Wally having become the new Flash. This drove him insane.