Astronaut Bill Hudson transmits to Earth from the NASA spacecraft Venturer. On board are crew members Jeff Allen and Judy Franklin. The ship's date is August 6, 1976. Bill explains that they are living proof of Dr. Stanton's "time thrust" theory. Due to the advanced speed of the Venturer, their Earth clock indicates that they have traveled over a century into the future. The craft begins to reel wildly as the Earth clock starts clicking up. The crew blacks out while the ship enters a planet's atmosphere and crashes into a desolate desert region. Meanwhile, General Urko, leader of the gorilla army, is debating before the Supreme Council of Ape City. He demands permission to begin an all-out assault on the humanoids. Cornelius, an animal psychologist, pleads for the council to allow the humanoids to live as subjects of scientific research. The Council decrees that the humans should not be exterminated since they have no language, but they will continue to be hunted, enslaved, domesticated and studied. According to the Book of Simian Prophecy, however, the humanoids must be destroyed if it is ever discovered that they can speak. Bill, Jeff and Judy have escaped their disabled, sinking ship and rafted to shore. Bill's watch reveals the date still to be August 6, but in the year 3979 A.D. With no better plan, they begin trekking across the wasteland. They encounter sudden electrical storms, high-velocity winds, tremors, unexplained flames and ruins. Judy pleads with Bill and Jeff to go on without her, but they refuse. Another mysterious wall of flames consumes their survival packs. After many days, they find green, living plants; water must be nearby. Suddenly, a quake swallows Judy. Frantic, the men move to higher ground in the hopes of spotting her and find a puzzling and frightening sight: ape faces carved into the mountainside. They find a group of primitive humans. They try to speak to them, but the primitives run away. Finally, Bill and Jeff collapse from exhaus
Elenco: Henry Corden , Austin Stoker , Richard Blackburn , Claudette Nevins , Philippa Harris .