- "Crazy, perhaps... schizophrenic, definitely. But my associates and I all share one quality in common. We are curious... "
Be-Three was an enlarged, disembodied mutant brain. He represented one-fifth of a composite cybernetic entity known as the Supreme Gestalt Commander (or Gestalt Mind in some cases). Be-Three and the rest of his collective were part of a vast electronic network located miles below the Earth in a region commonly referred to as the Forbidden Zone. Be-Three was schizophrenic and was prone for speaking in rhyme. Although the dominating partner entity, Be-One, recognized Be-Three's flaws, it regarded him as a valued aspect of the whole and was known to find wisdom in Be-Three's apparent ramblings. Like his gestalt colleagues, Be-Three loathed any organism that could be classified as non-mutant, and actively sought to exterminate those whose lives were not connected to that of the great machine. In its own backwards way, Be-Three felt that it was rendering humanity a service by destroying them. By taking away their lives, they would also be eliminating the physical discomforts of life.
In the mid-21st century, the human refugee Jason, and his chimpanzee companion, Alexander, ventured into the mutant caverns in search of the simian spiritual leader – the Lawgiver. A society of Mutant Drones called the Inheritors discovered them and brought them before the Gestalt Commander. Upon Be-Three's recommendation, the Gestalt entity consigned Jason and Alex to death. However, the two non-mutants managed to escape confinement and free the Lawgiver.
- The concept of the Supreme Gestalt Commander and its collective brain organisms was created by writer Doug Moench and artist Mike Ploog.
- As a disembodied brain, Be-Three is a sexually ambiguous creature. It is unknown whether its personality and biological make-up are intended to represent a man or a woman.
- Planet of the Apes Magazine: Terror on the Planet of the Apes (first appearance in Planet of the Apes Magazine #3)