In a future world about 20 years after the ending of the "Escape" film, the US is under a totalitarian government that condones ape slavery after a plague wipes out all cats and dogs.
Ricardo Mantalban is Armando, a circus owner who has control of an ape named Caesar. Caesar has the ability to speak since his parents were Zira and Cornelius. When this is discovered the government takes any steps necessary to find him and kill him because they now he will eventually lead a revolution that will end mankind.
Armando is taken into custody and eventually killed which enrages Caesar. Slowly over time he organizes the apes into an unstoppable army that proceeds to destroy a city and slowly take over.
This is definitely the most violent of the movies and yet it still appeals to families which is what Fox was afraid of when it was released. they thought families wouldn't enjoy it as much as the previous three films, but alas, they were wrong.
The stellar cast includes Roddy McDowell as Caesar, Don Murray, Natalie Trundy, Hari Rhodes, Severn Darden, John Randpolph, H. M. Wynant and the very sexy Asa Maynor.
If you enjoy the Apes series, then you'll love this one. Recommended.