Bio: Hacker was a computer specialist at Fort Leonard Wood repairing the mainframe that handle personnel records when he heard the G.I. Joe team was looking for new members. He hacked into the Pentagon's computers and put his name at the top of the candidate list. General Hawk thought he was being sloppy, but Hacker was just trying to get Hawk's attention, and gave him a disk containing the general's high school records including copies of detention slips. After spending some time as one of the Joes' "greenshirt" recruits, Hacker graduated to full member status as the Joes' information retrieval specialist.
On his first mission, he joined the team in its battle against the forces of a revived Serpentor on Cobra Island. Hacker later assisted Barrel Roll remotely when he hacked into Cobra Island's computer system.