Two astronauts, Virdon and Burke, are thrown through a time warp in space and end up on a planet ruled by apes in the year 3085.
Virdon and Burke fight to struggle to stay alive when they're forced into gladiator games by the governor of an ape village.
After being buried underground after an earthquake, Burke must work with General Urko to escape.
A young ape boy believes the humans have cursed his family's cow, when Virdon, Burke and an injured Galen take shelter in his home.
Virdon and Burke find a message left by scientists in their own time while exploring an ancient city.
If Virdon and Burke can't prove themselves as fishermen, the apes will sacrifice them to the sharks.
Galen shares a book on human anatomy with an old love who is now a surgeon when Virdon is injured.
The blind daughter of a recently murdered ape falls in love with Burke, not knowing he's human, as Galen and the astronauts try to hunt down the murdering apes.
Attempting to bargain for the life of a condemned human, Virdon saddles up for a horse race.
After being captured by the apes, will Burke be killed by Urko or brainwashed?
Galen, Virdon and Burke may be forced into a confrontation with General Urko while trying to disrupt the plans of an ape who is trying to take over a group of human farmers.
Will the humans help find a cure for a disease-ridden village before General Urko burns it down?
Virdon and Burke try to convince a group of humans to rebel against the apes instead of selling their own kind into slavery.
Unaware of her deadly intention, the astronauts help construct a hang glider for a chimpanzee scientist.