Dr. Theopolis was a recurring character on the NBC

NBC

The National Broadcasting Company is an American commercial broadcasting television network and former radio network headquartered in the GE Building in New York City's Rockefeller Center with additional major offices near Los Angeles and in Chicago...

 television series Buck Rogers in the 25th Century

Buck Rogers in the 25th Century (TV series)

Buck Rogers in the 25th Century is an American science fiction adventure television series produced by Universal Studios. The series ran for two seasons between 1979–1981, and the feature-length pilot episode for the series was released as a theatrical film several months before the series aired....

.

Theopolis, or Theo for short, was an intelligent computer

Computer

A computer is a programmable machine designed to sequentially and automatically carry out a sequence of arithmetic or logical operations. The particular sequence of operations can be changed readily, allowing the computer to solve more than one kind of problem...

 who was part of Earth's Computer Council. He was assigned with the process of assimilating Captain William "Buck" Rogers when he first arrived on Earth after having been in suspended animation

Suspended animation

Suspended animation is the slowing of life processes by external means without termination. Breathing, heartbeat, and other involuntary functions may still occur, but they can only be detected by artificial means. Extreme cold can be used to precipitate the slowing of an individual's functions; use...

.

Theo's appearance was that of an illuminated face in a round container which was shaped like a large disk. He had no means of independent locomotion, and so was often seen carried by Twiki

Twiki

Twiki is a fictional character on the television series Buck Rogers in the 25th Century. Twiki is a robot sometimes referred throughout the series as an "ambuquad"...

, his assistant. Twiki would typically attach Theo to his chest.

Theo had an important role on Earth as a sort of liaison between the Earth Defense Directorate and its leader Dr. Elias Huer, and the Computer Council, which is the planetary ruling body. Theo was considered one of Earth's leading scientists.

Theo and Twiki were clearly conceived as a similar pairing to the C-3PO

C-3PO

C-3PO is a robot character from the Star Wars universe who appears in both the original Star Wars films and the prequel trilogy. He is also a major character in the television show Droids, and appears frequently in the series' "Expanded Universe" of novels, comic books, and video games...

 and R2-D2

R2-D2

R2-D2 , is a character in the Star Wars universe. An astromech droid, R2-D2 is a major character throughout all six Star Wars films. Along with his droid companion C-3PO, he joins or supports Anakin Skywalker, Luke Skywalker, Princess Leia, and Obi-Wan Kenobi in various points in the saga...

 of Star Wars

Star Wars

Star Wars is an American epic space opera film series created by George Lucas. The first film in the series was originally released on May 25, 1977, under the title Star Wars, by 20th Century Fox, and became a worldwide pop culture phenomenon, followed by two sequels, released at three-year...

personalities from the successful Star Wars films. Theo would often express exasperation at Twiki who over time developed more and more human mannerisms.

The character of Dr. Theopolis did not return in the second season of the series. Twiki did return however, and the role that Theo did play vis a vis the ambuquad was replaced, at least in part, with the introduction of a new robot character, Crichton.

Eric Server

Eric Server

Eric Server is an American television character actor, best known for providing the voice of computer brain Dr...

 voiced the character for all of the first season, with one exception. In "Awakening", the very first episode of Buck Rogers, the character was voiced by Howard F. Flynn.