Beneath The Planet Of The Apes (1970) **

A campy, but completely humorless sequel to the 1968 hit. An astronaut, sent to find Taylor (the hero of the first film) finds himself between a rock and a hard place (i.e. a fascist ape culture and a human society that worships a nuclear weapon). It's a bleak allegory about racial and Cold War conflicts of the late 60's, and a very pessimistic prognostic about the future of humanity.