Be-Four was an enlarged, disembodied mutant brain. It represented one-fifth of a composite cybernetic entity known as the 'Supreme Gestalt Commander' (or 'Gestalt Mind') which led The Inheritors - a society descended from (presumably) human mutations. Be-Four and the rest of it's collective were part of a vast electronic network located below the Earth in a region commonly referred to as the Forbidden Zone. Each telepathically controlled a division of Mutant Drones, who quickly died if their contolling mind was killed. Be-Four spoke with poor grammar and pronunciation. Like it's gestalt colleagues, Be-Four loathed any organism that could be classified as non-mutant, and actively sought to exterminate them. During a battle in the Inheritor's cave home, Jason and Alex and their allies destroyed either Be-Four or Be-Five when they shattered its glass housing.
- Planet of the Apes Magazine: Terror on the Planet of the Apes (first appearance in Planet of the Apes Magazine #3)
- 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-Four is a sexually ambiguous creature. It is unknown whether its personality and biological make-up are intended to represent a man or a woman.
- Lexicon of the Planet of the Apes: The Definitive Encyclopedia, by Rich Handley (2010)