Sam Bishop

 was a member of UNIT. Though he came from a family of bookeepers and teachers, Sam was inspired to join the military as a child by his great-grandfather, who would regale him with stories of when he fought with the Eighth Army in North Africa during World War II, serving in battlefronts such as El-Alamein, Tobruk, and Gazala. He often went on dangerous missions. Kate Stewart sent him on a mission to the Gobi Desert to track an Energy unit. On this mission a set of Autons attacked him. He was then sent to Puerto Rico to track the Nestene energy units landing. (AUDIO: Earthfall) He sent Kate and Colonel Shindi to Black Archive 5, as there was something useful in the vault. (AUDIO: Armageddon)