Weapon X was a loner and, initially, an unwilling recruit to the X-Men. He reconsidered after meeting the team's telepath, Jean Grey. The two had an instant connection and eventually became lovers. Soon after, the X-Men were on a mission and Jean Grey was captured. Weapon X left the team and went on his own to infiltrate the Sinister's labs and was able to free Jean. Not willing to return to the X-Men, Logan and Jean worked on their own. After months of guerilla warfare, they were contacted by Sinister who revealed Apocalypse's plan to attack the humans in Europe. Logan and Jean delievered this information to the Human High Council and learned of the Council's plan to launch nuclear missles on America to stop Apocalypse. Jean went to warn America, but Weapon X stayed. When Logan reached America he saw Jean murdered by a plasma blast from Prelate Alex Summers. Enraged, Weapon X murdered Jean's killer and sat by his lover's side as the nuclear warheads fell on America. Somehow the missiles failed. Weapon X disappeared in the chaos that ensued and has not been seen since.