Beneath the Planet of the Apes

Beneath the Planet of the Apes (1970) plunges its protagonist into a desolate world ruled by simian overlords, where the discovery of a subterranean human civilization upends the narrative's bleak trajectory. Director Ted Post's apocalyptic vision expands on the original's themes, intertwining religious fervor with Cold War anxieties as the fragile peace between ape and man collapses in a maelstrom of violence and existential dread.