Doctor Theopolis is a fictional robot featured on the 1979-1981 science fiction television series Buck Rogers in the 25th Century. He was voiced on the series by actor Eric Server. Doctor Theopolis is an artificial intelligence from the 25th century. His robotic brain is housed within a spherical casing, which is usually carried by another robotic unit known as Twiki. When the Federation needs to pull together a strategy, Doctor Theopolis is usually placed on Doctor Elias Huer's desk so that it can contribute to any discussions. Although Doctor Theopolis is genderless, its voice tone is patterned after that of a male.