An issue over ten years in the making! An official ZERO HOUR crossover kicks off the second time-traveling story arc of "the greatest hero the world will never know" with "Blue and Gold," Part 1! Witness the secret origin of Booster Gold as he journeys through the time line, lost, in an attempt to return home...with a good friend in tow. But there's an evil out there waiting for him; one of the greatest villains of the DC Universe: Hal Jordan, a.k.a. Parallax!