The final part of Hammer’s Quatermass trilogy had a modest budget, the sets were bare and the special effects and models though often imaginative were scarcely state of the art even for the sixties.
However, Nigel Kneale's story is stunning, reaching far back into deep history in search of the horrific origins of man's bloody nature, replete with fascinating ideas of how this origin story has manifested itself through history in apparitions, witchcraft and occult folklore.
Excavations for a new underground station uncover a missile or a spaceship, and eventually reveals its huge locust-like occupants . Quatermass (Andrew Kier) leads the scientific exploration of the site, bringing him into conflict with civilian and military Government.
Analysis, and research into parish archives lead to the discovery... that mankind is the alien species, the slaughterers of the native inhabitants. Kneale had a special imagination and he delivers a thrillingly imaginative story/allegory. Its theory of a fundamentally divided human species seems more prescient than ever. And the ending is a knockout.
A measured, compelling and escalating nightmare of biology, engineering, politics, militarism and folklore.