It was the best of times, it was the worst of times: Relive the legendary first journey into the dystopian future of 2013 where Sentinels stalk the Earth, and the X-Men are humanity's only hope...until they die. Also featuring the first appearance of Alpha Flight, the return of the Wendigo, the history of the X-Men from Cyclops himself and a demon for Christmas!? Collecting UNCANNY X-MEN (1963) #138-143 and X-MEN ANNUAL #4.