Solar, Man of the Atom #4

Three versions of Phil Seleski walk the Earth. One, the young physicist. The second, a costumed hero called Solar. The equally powerful third, Phil's dark side. When the Edgewater nuclear disaster repeats itself, the superhumans meet Phil in the containment chamber. The three merge into one being to avert a reactor explosion. And, with the benefit of experience, Phil can now avoid destroying the world as he did in the previous timeline.