A trio of astronauts are thrust forward in time. They find themselves fugitives after crash-landing on the Planet of the Apes.

Urko and his army search the desert for the entrance to the Under-dwellers' caverns.

Bill and Jeff move the humans from the warpath of General Urko and his army.

The Simian Senate is holding a top-secret session debating the possibility of intelligent humans after one of Urko's soldiers returns, delirious from the Forbidden Zone.

During an archeological dig, Cornelius uncovers an ancient, human-made book entitled 'A Day at the Zoo'.

Bill and Jeff discuss the best means of eluding Urko's troops when Judy insists that the laser previously rescued from the ship be used as a source of escape.

Bill, Jeff and Judy head for the human settlement across the plain between the mountain ranges when they spy human shapes far below. A WWII Curtiss P-40 appears in the sky...

Bill, Jeff and Judy begin building rafts to help the human tribes reach New Valley. As always, Urko is in pursuit. I wonder if he gets paid overtime...

During the night, Ape City is awakened by the sounds of huge, flying objects.

As a result of a dog fight with the flying monster, most of the plane's fuel is gone leaving only a two to three-hour supply.

Reports pour in to the police that burglars are striking all over Ape City.

Urko has been relieved of his duties for three months because of his recent negligence involving his leadership and the failed attempts at capturing Blue Eyes and the rest of the humans.