son of Scott Summers and Jean Grey. In the future, constantly fights Apocalypse. Hates Bishop. Infected with techno-organic virus that will turn him into a robot slave of Apocalypse. his physic mutant powers are deadlocked with the virus, holding it at bay, with only his arm transformed.
Comes back in time for various reasons. preventing bad futures.
Most recently, Surrogate father to Hope Summers. Hope was the first mutant born after "no more mutants". she was taken to the future by Cable to protect her till adulthood, as the chosen messiah prophecies to save Earth. (from the Phoenix)