Doctor Theopolis (Theo) is a member of the Earth's Computer Council in the 25th century. Theo is known for his logical and thoughtful approach and, unlike other of his computerized class, holds humans in high regard. His primary function is as an intermediary between the Computer Council, Doctor Elias Huer, and select members of the Earth Defense Directorate. Amongst his other duties, he is also responsible for the environmental control within New Chicago.
Due to Theopolis' lack of built in ambulatory features, he is carried by a drone-type ambuquad, Twiki.
In 2491, Theopolis debriefs William "Buck" Rogers following his return to Earth in Ranger 3. Following his debriefing, Theopolis acts as Rogers' defense from charges brought up by the Computer Council after discovering the Draconian transmitter aboard his craft. Despite his logical assumption that they would find him innocent, he is astonished when his fellow Concil members find Rogers guilty of treason and sentence him for execution (BR25: "Awakening").