At long last, the origin of the Immortal Brothers is revealed. Find out the true story behind Timewalker, Armstrong and the Eternal Warrior's longevity. Runaway trains, space ships, unholy biological experimentation, Time Arcs and ray guns — this story has it all! Plus: the answer to the puzzle of which brother is really the oldest. The creative team pulls out all the stops as they launch readers on an epic, time-shaking adventure!