Jeff apparently lived with his grandmother. In 2008, the newly regenerated Eleventh Doctor convinced him to send a virus from his laptop to various alien experts, transmitting it across the world to bring Prisoner Zero to the Atraxi's attention. He was praised as a hero by the Doctor, who told Jeff that at least one of the alien experts would offer him a job. When Jeff asked why he was chosen by the Doctor, the Doctor replied that it was because it was his bedroom. (TV: The Eleventh Hour)