Contains The Uncanny X-Men Vol.1 #141 and 142 (I y II/1981), the saga known as DAYS OF FUTURE PAST.

Collects Uncanny X-Men #138-143 and Annual #4. Re-live the legendary first journey into the dystopian future 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 and the return of the Wendigo.