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!?
X-Men 138-141 (1963), Uncanny X-Men (1963) 142-143, Uncanny X-Men Annual (1970) 4