Taylor is examined by chimpanzee psychologist Dr. Zira and Dr. Cornelius, thinking he might be a missing link between humans and their "evolved superiors", the apes.
Dr. Cornelius is a chimpanzee archaeologist and historian who appears in the original novel of Planet of the Apes (La Planète des singes), and also the first three installments of the classic movie series of the same name.
In Beneath the Planet of the Apes, Cornelius and Zira meet another astronaut, Brent, who appears at their doorstep after being shot by a gorilla.
Zira gives birth to Milo (renamed Caesar in Conquest of the Planet of the Apes ) and is taken into hiding by Armando, a sympathetic circus owner.
In Battle for the Planet of the Apes, Zira appears in video stills, as her voice tells the story of their space-flight and Earth's destruction while her son, Caesar, watches.
In Taylor's last dying moments, his hand accidentally falls on the bomb's triggering mechanism, causing it to activate and destroy Earth.
The young chimpanzee Galen becomes his new assistant, but becomes a fugitive with two human astronauts Virdon and Burke, fleeing from Zaius and his gorilla enforcer, General Urko.
A chimpanzee character named Aldo was portrayed by David Chow in the previous film Conquest of the Planet of the Apes.
Armando is a circus owner, a human friend of Cornelius and Zira, and the foster-father of Caesar in Conquest of the Planet of the Apes.
Armando claims to be the one who cried out, and instructs Caesar to wait for him near the docks where shipments of apes arrive nightly for "conditioning".
Armando undergoes a lengthy interrogation at the hands of the state's authorities, who believe his alibi, but insist on using a hypnotic device which compels its subjects to tell the complete truth.
Breck is a province governor who rules in an authoritarian manner; he witnesses an ape auction one day, and on a whim bids on a young chimpanzee.
The three attempt to stop the apes from destroying the city, but Brent is killed by the gorilla troops moments before the mutant's Doomsday bomb is detonated.
In Escape from the Planet of the Apes, Dr Hasslein explains to a television news presenter his theories of time, and his belief that changing the future may be possible.
While the other members of the Presidential Commission appointed to deal with the "alien visitors" are initially skeptical of the time-travel story, Hasslein sees confirmation of his theories and is afraid that the pair's presence may start humanity's downfall.
Kolp first appears in Conquest of the Planet of the Apes as a ruling secret police official on Governor Breck's staff.
Dr Maximus is part of the National Academy tribunal which tries to discover if Zira and Cornelius surgically altered Taylor to speak.
Méndez leads the descendants of survivors of a nuclear war, which destroyed most of humanity and allowed the apes to rise to power.
Escaping, they head for the Forbidden Zone, where they discover a forgotten city peopled by telepathic mutants who worship a massive cobalt bomb.
The group of intelligent mutants that dwell in the Forbidden Zone use their psychic powers to deter the apes, Ursus and his gorillas are frightened, but Dr Zaius becomes enraged, charging forward.
Leo Davidson is an astronaut in Earth-orbit who in his ship accidentally falls through a vortex to another world inhabited by apes who enslave him.
Hostilities between humans and apes cease, Leo gives the chimpanzee to Ari and takes off in the newly arrived podship, piloting it through the same electromagnetic storm that brought him there.
A presentation to the board of directors of the laboratory to move the testing to trials on humans fails when a chimpanzee which has had the drug rampages and is shot.
Will realises the human body's immune system will eventually fight and repel the experimental drug and works on a stronger strain.
Caroline Aranha is a virtuous primatologist and veterinarian at the San Francisco Zoo; as well as the heroine and girlfriend of Will Rodman in Rise of the Planet of the Apes.
Malcolm leads a small group of humans who form a strong bond with Caesar and his apes, coming to understand they need not be rivals for resources in a post-flu world.
Dreyfus was the passionate leader of a group of humans living in California after losing his wife and children to the Simian Flu.
Dreyfus encounters Caesar and his colony at a local power station and, seeing them as a threat to humans, decides to wipe them all out leading him to become corrupt.
Wesley McCullough is a Green Beret Colonel (former 1st Special Forces Group) in charge of a rogue battalion called Alpha Omega in War for the Planet of the Apes.
He had managed to capture and subjugate Caesar and his clan into forced labor, reinforcing his stronghold as the rest of the US Army would attack out of disagreement with his methods.