Escape from the Planet of the Apes is the third in the series of films based upon the
Planet of the Apes characters created by novelist Pierre Boule. At the end of the second film, the centuries-in-the-future world colonized by simians was destroyed, but apes Cornelius (Roddy McDowell) and Zira (
Kim Hunter) were able to escape in the space vessel left behind by 20th-century astronaut
Charlton Heston. Cornelius and Zira pass through another time warp, finding themselves in the Earth of the 1970s. When they reveal their ability to speak, the apes are first treated as curiosities, then as threats when the government, believing the story that the Earth will eventually be inherited by monkeys, tries to prevent the birth of Zira's baby. Given shelter by sympathetic circus-owner
Ricardo Montalban, Cornelius and Zira are nonetheless "neutralized" by the government's special forces--but not soon enough to prevent the birth of their highly intelligent chimpanzee baby. What happens to that infant is the subject of the fourth "Apes" entry, 1972's Conquest of the Planet of the Apes. ~ Hal Erickson, All Movie Guide