The fifth and last of the series beginning with Planet of the Apes (to which this is a "prequel") and the most disappointing. Established in their own Ape City after the near destruction of mankind in WWIII, the social-democrat chimpanzee people, still led by Caesar (from Escape from the Planet of the Apes), become involved in a three-way struggle with a community of radiation-scarred human survivors and the militant gorilla people. There is a feeling of pointlessness about this simplistic film's attempt to squeeze a few more dollars from the series.