Spencer Pemberton

 was a second lieutenant in the Parachute Regiment, 3rd Battalion during the Korean War, where he met and mentored a young private called Alistair Lethbridge-Stewart. He was instrumental in instilling in Lethbridge-Stewart a desire to become an officer. (PROSE: The Ambush!)

By the late 1960s he and Lethbridge-Stewart were firm friends, and when the Special Forces Support Group (1 PARA) were sent in to deal with the London Event, Colonel Pemberton requested Lethbridge-Stewart's help - he was promptly brought in from Libya. Pemberton died at the hands of a Yeti. Captain Knight served under him for some time, and considered him a good commanding officer. (TV: The Web of Fear, PROSE: The Ambush!, The Forgotten Son)