The X-Men’s past, present and future collide in this 50th-anniversary event! Something horrible happens to the past versions of the X-Men that shakes spacetime to its core — and more X-Men arrive from the future with a message: The original five must return home! But when young Cyclops and Marvel Girl run away to stay in the present, the hunt is on! And where does the modern-day Cyclops’ revolutionary faction fit in?

Things get even more complicated when mysterious foes attack the Jean Grey School, and the healing-impaired Wolverine takes a mortal hit! With spacetime up for grabs, the surprise ending will change everything as the X-Men’s footing in the world is drastically altered!

Collecting: X-Men: Battle of the Atom 1-2, All-New X-Men 16-17, X-Men 5-6, Uncanny X-Men 12-13, & Wolverine & the X-Men 36-37