A Human male Starfleet officer [1], in the 2260s Terrell was the First officer of the USS Sagittarius, an Archer class scout-ship. He was aboard in 2265 when the Sagittarius transported Lieutenant Xiong to Starbase 47 (Vanguard). [2] He returned to Vanguard the following year. [3]
In the 2280s Terrell was the Captain of the Federation starship Reliant, when it was assigned to locate an uninhabited planetoid for the Genesis project. He was captured by Khan Singh when he beamed down to Ceti Alpha V, and was infected with a Ceti Eel larva. Under the influence of the creature Terrell attempted to lure Admiral Kirk into a trap and was partly successful in this goal, giving Khan the location of the Genesis device. When ordered to kill Kirk, Terrell managed to overcome the parasite sufficiently to commit suicide rather than kill a brother officer. [1]
