The first Flash Jay Garrick became the Flash by accidentally inhaling an experimental substance called hard water. He was one of the founding members of the JSA in the 1940's. He remains relatively youthful do to an accident that bathed the JSA including Jay's wife in rejuvenating rays. He is currently active with the JSA and mentors the new Speedster Impulse. The second Flash Barry Allen, a police scientist acquired super speed by being struck by lightning and being bathed with the chemicals he used for work. He mentored the current Flash, Wally West, his nephew who gained his powers in a freak accident that recreated the first one that gave Barry Allen his powers. Sadly Barry Allen died in the Crisis on Infinite Earths storyline in the 1980's. The third Flash Wally West started his career as Kid Flash working with the Teen Titans. He took over the mantle of the Flash from his deceased uncle Barry Allen.