Complex sociological themes run through this science-fiction classic about three astronauts marooned on a planet where highly intelligent apes rule and humans are slaves.The astronauts suddenly find themselves part of a devalued species, trapped and imprisoned by the simians. But one, the defiant Taylor (Charlton Heston), manages to break out and, aided by a pair of compassionate chimps, makes his escape to an uninhabited section of land. However, during the trek he makes a very unsettling discovery about the planet. The film, based on the novel by Pierre Boulle with a screenplay co-written by Rod Serling, led to four sequels, a TV series, and remake in 2001 by Tim Burton.