Jenkins was a Edwardian sailor who was abducted from Earth by the Eternals to crew the Shadow during the race for Enlightenment. He was in the crew room with the other sailors when the Fifth Doctor and Vislor Turlough entered. Jackson then introduced them to Jenkins and the other sailors. When the sailors received the summons for rum rations, Jenkins and the other sailors made a hurried exit from the crew room.
Jenkins was one of the sailors that drank the drugged rum that made them accept things like being in space and wearing pressurised suits. He was returned to Earth when the race concluded. (TV: Enlightenment)