The Amazing X-Men #3

"Parents of the Atom"

Magneto and Bishop battle Apocalypse and try to keep Maggie's son out of harm's way; The X-Men return home to find both their leader and Bishop gone; Quicksilver confronts Angel in trying to find the whereabouts of his father; Apocalypse has captured Bishop and uses the Shadow King to pull information out of him; Bishop expels the Shadow King but still has Abyss to deal with; The X-Men prepare to mount a rescue of Bishop.

Part of the Age of Apocalypse event.