Return to the future in a tale that reveals the events leading up to the timeless classic! In a world where mutants are more than simply hated and feared but not yet slain and apprehended, Senator Kelly's assassination comes to pass - bringing with it the Mutant Control Act and Sentinels on every corner. But with mutantkind on their back foot, what lengths will Kate Pryde, Wolverine, Colossus, Storm, Banshee, Angel, Cyclops, Professor X and the rest of the X-Men go to in order to find some way to survive? And what scheme of Magneto's will bring about their ultimate doomsday? Witness the thirty-year descent into dystopia as one of the most celebrated X-Men timelines is explored in-depth for the first time! Collecting X-MEN: DAYS OF FUTURE PAST - DOOMSDAY #1-4.