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:

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